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ONT

Find cheap Delta flights to Ontario from $79

1 adult
0 bags
Fri 6/7
Fri 6/14

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Good to know

Low season

January

High season

December

Cheapest flight

$79

Average price round-trip

$628

Good deal round-trip

$568

Good deal one-way

$348
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly with an average 14% increase in price.
Flight from Seattle to Ontario
(avg. price over the last 2 weeks)
or less
or less

When to book flights with Delta to Ontario

Average price per month
Flight prices as travel date approaches

FAQs for flying to Ontario with Delta

  • Is Delta cheaper than other airlines flying to Ontario?

    With an average return price of $628, Delta is the most expensive airline flying into Ontario. The cheapest airline flying to Ontario is Frontier.

  • Which other airlines fly to Ontario?

    Along with Delta, you can also fly to Ontario with JetBlue, Frontier, Hawaiian Airlines, JetBlue, Frontier and Hawaiian Airlines.

  • How much is a flight to Ontario with Delta?

    On average, Delta flights to Ontario cost $393 for one-way and $628 return.

  • Which airport do Delta flights to Ontario fly into?

    You’ll fly into Ontario Airport when flying to Ontario with Delta.

  • Are there any other airlines in SkyTeam that fly to Ontario?

    Unfortunately, there are no other airlines in SkyTeam that fly to Ontario.

See more FAQs

Top tips for your flights to Ontario with Delta

  • Looking to fly from the United States to Ontario with Delta? 25% of our users found flights for the following prices or less: From Atlanta $348 one-way, $568 round-trip.
  • The cheapest flight to Ontario with Delta found on KAYAK in the last 2 weeks departed from Atlanta and cost $348.

Delta customer reviews

8.0
Very goodBased on 10,810 verified guest reviews
7.9Comfort
8.6Crew
8.2Boarding
7.4Food
8.0Entertainment
Pros +
Cons -
Traveler rating:
Sort by:
A
3.6 Poor
Pros:On board crew was helpful and polite considwring our circumstances.
Cons:Our flight was delayed 3xs (non weather) they said we would miss our connection (I didn't think we would) THEY rebooked a later flight. Of course we landed in time for our original flight. They refused to let us back on our original flight. Put me in touch w/ the help desk who after talking in circles admitted it was their mistake but he had no authority to help. FINAlly & only because others missed their flight we were given the option to go. Crew misplaced our luggage and sent it on a flight we were never supposed to be on, and the bad experience with delays of hours on end continued coming home. (Mechanimal non weather) WE WILL NEVER FLY DELTA AGAIN!
H
8.0 Very good
Super good crew... food was pretty awful- overall Delta is my favorite carrier- takes off on time, good boarding process etc.
N
6.0 Okay
It was a crowded flight. They did the best they could.
A
10.0 Wonderful
Wider seats/planes
A
10.0 Wonderful
Pros:We actually did not fly this route. We bought a car and drove home!
A
9.0 Wonderful
Pros:Food was good and plentiful. I definitely left the flight feeling full.
G
2.6 Poor
Cons:Got stuck for two hours sitting in the plane because the computer systems went down.
M
9.2 Wonderful
Cons:Seats are tight
F
10.0 Wonderful
Pros:The crew was amazing and seats were comfortable
Cons:Nothing
A
8.3 Very good
Pros:The crew was fantastic and very carrying when I wasn’t feeling well. They checked on me multiple times! The food was also really good for airline food!
Cons:The security process in the Prague airport is so ridiculous. There are security agents who screen you in the baggage drop off line that makes the line take a very long time. Once you finally get your sticker from them it’s a quick trip through customs. Then the pain really begins with a security scan st each individual gate to enter a boarding area for the plane. Then I was pulled for extra security where a male agent touched my but with some sort of swab with no warning. He then claimed to not speak English (with zero accent when I asked him a question). It was a humiliating and very long process all run by delta!
Read more about Delta

Book Cheap flights with Delta to Ontario

Recent round-trip flight deals

6/19Wed
nonstopDelta
2h 45mSEA-ONT
6/19Wed
nonstopDelta
2h 44mONT-SEA
$157
8/13Tue
1 stopDelta
4h 29mSEA-ONT
8/21Wed
nonstopDelta
2h 44mONT-SEA
$166
8/14Wed
1 stopDelta
4h 29mSEA-ONT
8/20Tue
1 stopDelta
4h 48mONT-SEA
$176
6/8Sat
nonstopDelta
2h 46mSEA-ONT
6/8Sat
nonstopDelta
2h 44mONT-SEA
$177
7/18Thu
nonstopDelta
2h 52mSEA-ONT
7/24Wed
1 stopDelta
5h 07mONT-SEA
$186
8/13Tue
1 stopDelta
4h 29mSEA-ONT
8/24Sat
1 stopDelta
6h 57mONT-SEA
$196
6/8Sat
1 stopDelta
6h 06mDEN-ONT
6/15Sat
1 stopDelta
5h 55mONT-DEN
$196
6/6Thu
nonstopDelta
2h 38mSEA-ONT
6/10Mon
nonstopDelta
2h 46mONT-SEA
$197
6/5Wed
1 stopDelta
6h 45mSEA-ONT
6/12Wed
1 stopDelta
5h 27mONT-SEA
$201
6/1Sat
1 stopDelta
4h 30mSEA-ONT
6/5Wed
nonstopDelta
2h 59mONT-SEA
$206
8/11Sun
nonstopDelta
2h 43mSEA-ONT
8/21Wed
nonstopDelta
2h 44mONT-SEA
$207
6/4Tue
1 stopDelta
6h 33mDEN-ONT
6/11Tue
1 stopDelta
4h 54mONT-DEN
$208
8/16Fri
1 stopDelta
4h 29mSEA-ONT
8/24Sat
1 stopDelta
5h 11mONT-SEA
$216
5/25Sat
1 stopDelta
4h 39mDEN-ONT
5/29Wed
1 stopDelta
4h 54mONT-DEN
$216
5/29Wed
1 stopDelta
6h 34mSEA-ONT
6/13Thu
1 stopDelta
6h 59mONT-SEA
$221
8/14Wed
1 stopDelta
4h 29mSEA-ONT
8/23Fri
1 stopDelta
4h 48mONT-SEA
$226
5/21Tue
1 stopDelta
5h 53mDFW-ONT
6/1Sat
1 stopDelta
9h 09mONT-DFW
$226
8/11Sun
nonstopDelta
2h 43mSEA-ONT
8/22Thu
nonstopDelta
2h 40mONT-SEA
$227
6/8Sat
1 stopDelta
6h 06mDEN-ONT
6/13Thu
1 stopDelta
4h 54mONT-DEN
$228
5/29Wed
2 stopsDelta
10h 03mDFW-ONT
6/4Tue
1 stopDelta
5h 15mONT-DFW
$231

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Recent one-way flight deals

7/9Tue
nonstopDelta
2h 48mSEA-ONT
$79
6/12Wed
1 stopDelta
4h 29mSEA-ONT
$88
6/25Tue
1 stopDelta
6h 06mDEN-ONT
$98
8/25Sun
nonstopDelta
2h 43mSEA-ONT
$99
6/4Tue
1 stopDelta
4h 28mDEN-ONT
$104
6/8Sat
1 stopDelta
4h 29mSEA-ONT
$108
6/6Thu
nonstopDelta
2h 42mSEA-ONT
$109
6/5Wed
1 stopDelta
6h 45mSEA-ONT
$113
6/5Wed
1 stopDelta
5h 53mDFW-ONT
$113
7/1Mon
1 stopDelta
6h 05mDEN-ONT
$118
6/15Sat
1 stopDelta
8h 42mIAH-ONT
$119
5/31Fri
1 stopDelta
6h 33mDEN-ONT
$124
5/31Fri
1 stopDelta
10h 48mJFK-ONT
$128
5/31Fri
1 stopDelta
9h 42mEWR-ONT
$128
7/6Sat
nonstopDelta
2h 48mSEA-ONT
$129
5/31Fri
1 stopDelta
10h 18mJFK-ONT
$133
5/31Fri
2 stopsDelta
10h 37mLGA-ONT
$133
5/31Fri
1 stopDelta
7h 57mEWR-ONT
$133
5/21Tue
1 stopDelta
6h 43mSEA-ONT
$138
5/30Thu
2 stopsDelta
11h 33mLGA-ONT
$138

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Flights to Ontario - Delta

Destination:

Ontario (ONT)United States

Return flight deals:

Ontario - United States

Cabin classes:

$341
First Class flights to Ontario
$478
Business Class flights to Ontario
$193
$29

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