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Find cheap Delta flights to Ontario from $79

1 adult
0 bags
Tue 6/18
Tue 6/25

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Good to know

Low season

January

High season

May

Cheapest flight

$79

Average price round-trip

$628

Good deal round-trip

$558

Good deal one-way

$218
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly and prices are also 7% lower on average.
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 American Airlines, 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 $498 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 $359 one-way, $558 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 10,647 verified guest reviews
8.2Boarding
7.9Comfort
8.6Crew
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

8/6Tue
nonstopDelta
2h 43mSEA-ONT
8/21Wed
nonstopDelta
2h 44mONT-SEA
$157
8/6Tue
nonstopDelta
2h 39mSEA-ONT
8/13Tue
1 stopDelta
4h 48mONT-SEA
$167
8/21Wed
1 stopDelta
6h 43mSEA-ONT
8/27Tue
1 stopDelta
4h 48mONT-SEA
$176
8/21Wed
nonstopDelta
2h 39mSEA-ONT
8/29Thu
nonstopDelta
2h 44mONT-SEA
$177
6/25Tue
1 stopDelta
4h 29mSEA-ONT
7/10Wed
nonstopDelta
2h 44mONT-SEA
$187
8/21Wed
1 stopDelta
6h 43mSEA-ONT
8/26Mon
1 stopDelta
4h 48mONT-SEA
$196
7/11Thu
nonstopDelta
3h 01mSEA-ONT
7/15Mon
nonstopDelta
2h 46mONT-SEA
$197
7/15Mon
1 stopDelta
6h 45mSEA-ONT
7/20Sat
nonstopDelta
2h 44mONT-SEA
$207
6/21Fri
1 stopDelta
6h 47mSEA-ONT
6/24Mon
1 stopDelta
5h 27mONT-SEA
$216
7/21Sun
1 stopDelta
6h 34mIAH-ONT
8/3Sat
1 stopDelta
5h 49mONT-IAH
$216
6/22Sat
1 stopDelta
6h 06mDEN-ONT
6/24Mon
1 stopDelta
4h 28mONT-DEN
$216
8/15Thu
1 stopDelta
4h 29mSEA-ONT
8/19Mon
1 stopDelta
4h 48mONT-SEA
$217
6/12Wed
1 stopDelta
4h 29mSEA-ONT
6/17Mon
1 stopDelta
6h 59mONT-SEA
$221
6/11Tue
1 stopDelta
4h 29mSEA-ONT
6/15Sat
1 stopDelta
5h 27mONT-SEA
$226
6/10Mon
1 stopDelta
6h 43mIAH-ONT
6/18Tue
1 stopDelta
8h 03mONT-IAH
$228
7/25Thu
1 stopDelta
6h 25mDEN-ONT
7/29Mon
1 stopDelta
4h 50mONT-DEN
$236
8/6Tue
1 stopDelta
4h 29mSEA-ONT
8/21Wed
1 stopDelta
4h 48mONT-SEA
$246
9/4Wed
2 stopsDelta
12h 07mDFW-ONT
9/10Tue
1 stopDelta
7h 45mONT-DFW
$247
6/24Mon
nonstopDelta
2h 43mSEA-ONT
6/27Thu
nonstopDelta
2h 44mONT-SEA
$247
6/5Wed
1 stopDelta
6h 34mSEA-ONT
6/11Tue
1 stopDelta
5h 27mONT-SEA
$251

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Recent one-way flight deals

8/7Wed
nonstopDelta
2h 43mSEA-ONT
$79
7/16Tue
1 stopDelta
6h 45mSEA-ONT
$88
6/25Tue
1 stopDelta
6h 06mDEN-ONT
$98
6/15Sat
nonstopDelta
2h 45mSEA-ONT
$99
6/4Tue
1 stopDelta
5h 53mDFW-ONT
$108
6/19Wed
1 stopDelta
6h 47mSEA-ONT
$108
8/4Sun
1 stopDelta
7h 00mIAH-ONT
$108
6/8Sat
1 stopDelta
6h 06mDEN-ONT
$108
7/4Thu
1 stopDelta
4h 07mDEN-ONT
$118
6/9Sun
nonstopDelta
2h 45mSEA-ONT
$119
6/8Sat
2 stopsDelta
8h 27mORD-ONT
$123
7/31Wed
1 stopDelta
7h 10mLGA-ONT
$128
8/13Tue
1 stopDelta
9h 12mEWR-ONT
$128
6/12Wed
2 stopsDelta
12h 55mLGA-ONT
$133
7/16Tue
1 stopDelta
7h 03mDFW-ONT
$134
8/23Fri
1 stopDelta
4h 46mDEN-ONT
$134
6/1Sat
1 stopDelta
8h 54mHOU-ONT
$138
6/4Tue
1 stopDelta
10h 18mJFK-ONT
$143
7/10Wed
1 stopDelta
10h 57mLGA-ONT
$143
7/10Wed
1 stopDelta
10h 57mLGA-ONT
$147

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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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