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BOI - STL

$98 Find cheap flights from Boise to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boise to St. Louis departing on 6/25. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Wed 7/10
Wed 7/17

Search hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boise to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boise to St. Louis, as well as popular online travel agencies
In the last 7 days travelers have searched 42,898,604 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

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Filter your dealsChoose cabin class, free Wi-Fi and more.

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Cheap flight deals from Boise to St. Louis (BOI-STL)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boise to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
9:13 pm - 1:05 pmBOI-STL
14h 52m1 stop
4:02 pm - 8:56 amSTL-BOI
17h 54m1 stop
$229Spirit Airlines
Find Deal
Tue, Jun 25 - Fri, Jul 12
9:49 pm - 1:04 pmBOI-STL
14h 15m1 stop
1:59 pm - 11:22 amSTL-BOI
22h 23m1 stop
$256Spirit Airlines
Find Deal
Fri, Sep 27 - Mon, Sep 30
12:51 am - 9:29 amBOI-STL
7h 38m1 stop
7:39 am - 4:44 pmSTL-BOI
10h 05m1 stop
$301American Airlines
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Tue, Jul 30 - Sun, Sep 1
6:26 pm - 12:55 amBOI-STL
5h 29m1 stop
10:04 am - 2:12 pmSTL-BOI
5h 08m1 stop
$302Delta
Find Deal
Wed, Jul 31 - Sun, Sep 1
6:35 am - 11:50 pmBOI-STL
16h 15m1 stop
5:22 am - 10:56 amSTL-BOI
6h 34m1 stop
$303American Airlines
Find Deal
Tue, Jul 2 - Sat, Jul 6
2:46 pm - 11:59 pmBOI-STL
8h 13m1 stop
2:24 pm - 10:20 pmSTL-BOI
8h 56m1 stop
$342Alaska Airlines
Find Deal
Thu, Nov 14 - Mon, Nov 18
11:35 pm - 9:06 amBOI-STL
8h 31m1 stop
3:18 pm - 11:38 pmSTL-BOI
9h 20m2 stops
$350Delta
Find Deal
Fri, Sep 27 - Mon, Sep 30
2:46 pm - 11:59 pmBOI-STL
8h 13m1 stop
7:00 am - 1:51 pmSTL-BOI
7h 51m1 stop
$354Alaska Airlines
Find Deal
Thu, Nov 14 - Sun, Nov 17
2:27 pm - 10:11 pmBOI-STL
6h 44m1 stop
9:05 am - 7:15 pmSTL-BOI
11h 10m2 stops
$389United Airlines
Find Deal
Wed, Jul 31 - Sun, Sep 1
5:05 am - 2:18 pmBOI-STL
8h 13m2 stops
5:30 pm - 10:36 pmSTL-BOI
6h 06m1 stop
$431United Airlines
Find Deal
Tue, Jul 2 - Sat, Jul 6

Flights from Boise to St. Louis - Travel Insights & Trends

Get data-powered insights and trends into flights from Boise to St. Louis to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Boise to St. Louis?

The average price of all flights from Boise to St. Louis clicked on KAYAK for each day over the last 12 months.
When flying from Boise to St. Louis, you should consider leaving on a Tuesday and avoid Mondays if you are looking for the best rates. For your return to Boise, you’ll find the best rates on Wednesdays and the most expensive ones on Fridays.

What is the cheapest month to fly from Boise to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Boise to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Boise to St. Louis is February, where tickets cost $349 on average. On the other hand, the most expensive months are March and July, where the average cost of tickets is $584 and $571 respectively.

How far in advance should I book a flight from Boise to St. Louis?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Boise to St. Louis, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Boise to St. Louis, you should book around 5 days before departure. For the absolute cheapest price, our data suggests you should book 5 days before departure.

Which airlines provide the cheapest flights from Boise to St. Louis?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the last 3 days, Spirit Airlines offered the best one-way deal for that route, at $98. KAYAK users also found Boise to St. Louis round-trip flights on Spirit Airlines from $229 and on American Airlines from $301.

Good to know

Low season

February

High season

April

Cheapest flight

$98
Best time to beat the crowds with an average 26% drop in price.
Most popular time to fly and prices are also 8% lower on average.
Flight from Boise to St. Louis

When to book flights from Boise to St. Louis

Are your dates flexible? Find out the best times to travel from Boise to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Boise to St. Louis

  • What is the cheapest flight from Boise to St. Louis?

    In the last 3 days, the lowest price for a flight from Boise to St. Louis was $98 for a one-way ticket and $229 for a round-trip.

  • Do I need a passport to fly between Boise and St. Louis?

    No

  • Which airports will I be using when flying from Boise to St. Louis?

    When flying out of Boise you will be using Boise Air Term. Gowen Fld. You will be landing at St. Louis, also known as Lambert-St Louis.

  • Which aircraft models fly most regularly from Boise to St. Louis?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Boise to St. Louis?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between Boise and St. Louis, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Boise to St. Louis, Delta or Alaska Airlines?

    The two airlines most popular with KAYAK users for flights from Boise to St. Louis are Delta and Alaska Airlines. With an average price for the route of $462 and an overall rating of 8.0, Delta is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $373 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from Boise to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Boise to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Boise to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Boise is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Boise to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Boise with another airline. Booking your flights between Boise and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Boise to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Boise up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top 5 airlines serving from Boise to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Boise to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Boise to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 9254 reviews
7.3Food
7.9Comfort
8.2Boarding
7.3Entertainment
8.6Crew
Airline reviews

Everything was great but there were no entertainment options available.

6.0 GoodKyndra Homuth, Jun 2024SFO - PDX
Read more about Alaska Airlines reviews

Everything was great but there were no entertainment options available.

The crew was the best I’ve had the experience of flying with. A misbehaving child was making things difficult for me with bopping my tray table, taking my snack, and continually tapping or bumping me. The crew quietly and respectfully moved me to another seat, and thanked me for my patience. They couldn’t have been more kind. Their professionalism really stood out to me and I am more than happy to leave a great review for them!

It was okay. Gate crew could be better organized. Wheelchair service for my mother was late as we deplaned. Flight crew was alright. I’ve seen better and worse.

I would have appreciated notification that our flight was moved to another gate LAST MINUTE so that we would not have missed it. We got no such notice and had to spend another night to catch an available flight in the morning, which was huge inconvenience. We will never fly Alaska again.

Great! Wish we had more Alaska flight options in MSP

I was happy with my whole experience, and it was a smooth flight. Thank you

Flight was delayed 2 hours. It was too cold inside the cabin. My seat mate had no jacket so she was shivering the entire flight. The stewardess says there’s no available blanket.

Liked premium seat. Did not like: having to pay for entertainment/wi-fi; having to pay for food; single-aisle; and, only three rest rooms.

The plane had to sit on the tarmac for 45 minutes once it had landed. Not Alaska’s fault.

The airline was way too cold. We were freezing, I don’t know if that is normal. Overall it was pretty good flight. Always flown Alaska Airlines and I am not changing.

3 hours late and all they have is was a $12 meal voucher. That’s not even enough to cover fast food.

Among the poorest flights I’ve had with Delta in a while. Entertainment system failed completely on a 7.5 hr flight. Crew seemed distracted and not the normal friendly crew. Flight overbooked it seemed… very crowded.

If I can, I always fly Delta. I’ve found their service to always be reliable and pleasant.

You could have not cancelled the flight (AA, which I will be flying from now on) left for BOS despite the fictitious weather issues (that no one in my Boston family could see). You could have rebooked my direct flight to another direct flight instead of sending me though JFK, the worst US airport after O’Hara You could have rebooked me on a Main Cabin seat (like the one I paid for in my original ticket instead of putting me a the last row on JFK->BOS leg, pocketing the difference in ticket price But I do not really care whether you will ever do that in a future because in a future neither I nor anyone from my company (unless they pay out of pocket) nor an of my clients and partners (if they heed my advice) will ever be caught dead on any of Delta flights

Really bad baggage handling. Had my Rimowa bag badly damaged at the latches.

It was pretty good I was worried with the short Layover that I might not catch my connection but the gate was there

It was good until there was a 3 hour delay because there was not any pilots to fly the plane.

There was plenty of overhead room but half of the passengers were told they had to check their carryon bags. My partner and I checked in as early as possible and our seats were split across the aisle.

Friendly flight attendants. Comfort plus seats were very comfortable and had lots of leg room. 10A and 10 B.

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

It is a modern tragedy that any airline expects you to travel for 14 hours in such discomfort and that the only way to add comfort is exorbitant prices. I was in pain by the time we landed. Shameful.

Original plane sidelined. Had to wait an hour for replacement.

Crew was very cooperative and professional. Passenger's first checked in bag should be free.

No real agent onsite helping you for missing luggage there. Not like the other airline next to UA desk, they have staff attending in their desk assisting answer/helping luggage issue, even after midnight.

Horrible, the flights kept delaying, so it is obvious that we won't be able to make it to the next connection. No easier/real agent on site to help you figure this out. UA agent on other counters refuse to assist you and direct us to use the QR code/call customer service. So inefficient and poor. While technology seems convenient, but it's not the best interest/experience for customers need help while there is active issue need assistance.

After the morning frenzy of 35 min wait through CLT security at 4;30 AM, it was nice to have a smooth pleasant boarding experience. This 6:30 AM flight was not full. We were able to get seated swiftly and took off promptly. Nice touch they distributed the old fashioned headsets with 8 mm jacks. Snacks were decent and arrival was uneventful.

My window shade didn’t work. So I missed coming into my city. ☹️

Flight was delayed in the gate by 5 hours and ultimately cancelled- rebooking service by United agents was terrible

Flight was delayed due to the late arrival of the catering truck, which is quite unacceptable. There was a beverage service, but no pretzel, or cookie, or nuts were served in coach.

Not worth the price of premium class ticket paid, felt more like steerage.

This is by far the worst experience I have had with American Airlines. The start of this trip was a complete disaster. I purposely planned my trip so that I would weather any delays so that I could make very important meeting at the Pentagon. My flight was cancelled because of maintenance and I was put on the first flight the next day but I was late to the meeting. After a long week at the Pentagon I just wanted to go home and my flight home which was early in the day was delayed. Eventually the flight was delayed until the next day. I was not authorized a hotel room because DCA was my point of origin. So I paid for a hotel out of pocket. The flight this morning was boarded then deplaned because the aircraft was hot. The flow of information was not happening in DCA and made it worse when the news was bad. I am going to take a break from American for my next few military flights. Hopefully whatever has been going on with American Airlines will be resolved.

We had a 2 hour delay. The seats were smaller than most other airlines. The person in front of us wanted to lay back and we had to stop her because she was pressing against my girlfriend’s legs. We had to ask her to sit up and not lay back due to the lack of room.

Everything was fine once we actually got on our flight. It was more then annoying they canceled (delayed) our flight. We lost out on a day of our trip along with money on our stay. Plus we had to book another hotel. So expensive.

This flight was canceled and delayed several times without explanation. The plane was freezing cold and no wifi for messaging. Getting off the plane was terribly unorganized and felt like it took forever….

The flight was delayed several times without explanation. The seats were terribly uncomfortable and wifi isn’t included. All these make for a less than ideal flight.

The flights was delayed by hours and it was the firmest landing I have experienced in my life. My back is still sore.

Internet service was erratic. Crew service was poor and slow. My luggage on this non-stop flight was lost and not recovered

Terrible. I didn’t fly and I had an important meeting the next day.

Equipment swap led to 2+ hour delay on international flight. And to top it off, boarding took forever.

Wretched scheduling - they got themselves into a critical crew situation and didn’t try to address it until 15 minutes before they had to cancel my flight

Flight was canceled less than 6 hours before takeoff, rebooked on a flight that was twice as long and left earlier so we couldn’t make it, when using text support option took over 2 hours to speak with someone.

Not enough help at airport during boarding process. Flight was delayed. Overall WORST flying experience I’ve ever had. Will NEVER FLT SPIRIT AGAIN

Terrible legroom, seats do not recline, tray table the size of an iPhone, delayed flight, have to pay 5$ to get a cup of water onboard.

Could have TV/Movie and some water ou soda free

Flight was good and clean but delayed over an hour on the return flight.

The non stop flight and able to go into Atlantic City airport. They could lower the prices. It starts out low but then if you want to bring luggage and pick your seat the price goes up quite a bit.

Flight got diwngraded last minute and left us stranded. I was told I’ll be given credit for my luggage and seat upgrades but haven’t got anything yet

We can’t predict circumstances like this ahead of time, but I give your staff a hats off for immediately giving us updated informations.

It was nice! There was a very unhappy child in front of us and the flight attendant did a great job calming the child. I was impressed.

The plane was not on time for boarding or departure or arrivals.

Book cheap flights from Boise to St. Louis

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Boise to St. Louis found on KAYAK in the last 72 hours.
6/25Tue
1 stopSpirit Airlines
14h 52mBOI-STL
$98
6/27Thu
1 stopSpirit Airlines
16h 03mBOI-STL
$140
7/10Wed
3 stops
26h 42mBOI-STL
$144
7/9Tue
1 stopDelta
7h 58mBOI-STL
$151
6/27Thu
2 stops
16h 13mBOI-STL
$180
7/10Wed
2 stopsDelta
10h 34mBOI-STL
$192
7/9Tue
2 stopsAlaska Airlines
19h 45mBOI-STL
$228
7/9Tue
2 stopsAmerican Airlines
15h 28mBOI-STL
$237
7/8Mon
2 stopsAmerican Airlines
15h 28mBOI-STL
$283
6/25Tue
2 stopsUnited Airlines
11h 32mBOI-STL
$288

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Boise - St. Louis Flights

Departure:

Boise (BOI)United States

Destination:

St. Louis (STL)United States

Return flight deals:

St. Louis - Boise

Cabin classes: