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ONT

Find cheap Delta flights to Ontario from $81

1 adult
0 bags
Sat 6/29
Sat 7/6

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Good to know

Low season

January

High season

May

Cheapest flight

$81

Average price round-trip

$286
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly and prices are also 6% lower on average.
Flight from Seattle to Ontario
(price for this month)

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

  • 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 $598 one-way.

  • 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

  • The cheapest flight to Ontario with Delta found on KAYAK in the last 2 weeks departed from Atlanta and cost $359.

Delta customer reviews

8.0
Very goodBased on 10,457 verified guest reviews
8.6Crew
8.2Boarding
7.9Comfort
8.0Entertainment
7.4Food
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

7/9Tue
nonstopDelta
2h 47mSEA-ONT
7/10Wed
nonstopDelta
2h 46mONT-SEA
$157
7/9Tue
1 stopDelta
6h 45mSEA-ONT
7/16Tue
nonstopDelta
2h 41mONT-SEA
$167
8/6Tue
1 stopDelta
6h 45mSEA-ONT
8/21Wed
1 stopDelta
5h 03mONT-SEA
$176
7/24Wed
nonstopDelta
3h 01mSEA-ONT
7/27Sat
nonstopDelta
2h 44mONT-SEA
$177
7/5Fri
1 stopDelta
6h 48mSEA-ONT
7/10Wed
nonstopDelta
2h 44mONT-SEA
$187
6/26Wed
1 stopDelta
6h 47mSEA-ONT
7/10Wed
nonstopDelta
2h 44mONT-SEA
$192
7/24Wed
1 stopDelta
6h 45mSEA-ONT
8/8Thu
1 stopDelta
6h 57mONT-SEA
$196
7/2Tue
1 stopDelta
6h 05mDEN-ONT
7/9Tue
1 stopDelta
4h 59mONT-DEN
$196
6/19Wed
nonstopDelta
2h 43mSEA-ONT
8/23Fri
nonstopDelta
2h 44mONT-SEA
$197
6/30Sun
1 stopDelta
6h 47mSEA-ONT
7/2Tue
nonstopDelta
2h 47mONT-SEA
$207
6/25Tue
1 stopDelta
6h 47mSEA-ONT
7/2Tue
nonstopDelta
2h 47mONT-SEA
$212
8/14Wed
1 stopDelta
9h 33mDFW-ONT
8/21Wed
1 stopDelta
8h 25mONT-DFW
$216
8/4Sun
1 stopDelta
7h 00mIAH-ONT
8/16Fri
1 stopDelta
6h 18mONT-IAH
$216
7/3Wed
1 stopDelta
4h 24mDEN-ONT
7/14Sun
1 stopDelta
4h 59mONT-DEN
$216
7/13Sat
1 stopDelta
6h 25mDEN-ONT
7/14Sun
1 stopDelta
4h 59mONT-DEN
$217
8/7Wed
2 stopsDelta
9h 59mDFW-ONT
8/10Sat
1 stopDelta
9h 40mONT-DFW
$221
8/7Wed
2 stopsDelta
9h 59mIAH-ONT
8/10Sat
1 stopDelta
5h 53mONT-IAH
$221
7/2Tue
1 stopDelta
5h 08mSEA-ONT
7/10Wed
1 stopDelta
7h 01mONT-SEA
$226
7/11Thu
1 stopDelta
7h 00mIAH-ONT
7/17Wed
1 stopDelta
7h 38mONT-IAH
$226
6/12Wed
1 stopDelta
4h 37mDEN-ONT
6/19Wed
1 stopDelta
4h 54mONT-DEN
$226

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Recent one-way flight deals

8/27Tue
nonstopDelta
3h 01mSEA-ONT
$81
8/27Tue
1 stopDelta
4h 29mSEA-ONT
$88
7/20Sat
1 stopDelta
6h 25mDEN-ONT
$98
8/26Mon
nonstopDelta
2h 47mSEA-ONT
$99
8/26Mon
1 stopDelta
6h 47mSEA-ONT
$108
8/22Thu
1 stopDelta
7h 56mDFW-ONT
$108
8/13Tue
1 stopDelta
7h 00mIAH-ONT
$108
6/18Tue
1 stopDelta
6h 06mDEN-ONT
$108
6/26Wed
1 stopDelta
6h 47mSEA-ONT
$113
8/8Thu
2 stopsDelta
9h 59mDFW-ONT
$113
7/24Wed
1 stopDelta
10h 42mORD-ONT
$118
6/27Thu
1 stopDelta
7h 02mIAH-ONT
$118
6/12Wed
1 stopDelta
6h 06mDEN-ONT
$118
6/11Tue
2 stopsDelta
11h 35mORD-ONT
$123
6/12Wed
1 stopDelta
9h 02mJFK-ONT
$128
6/12Wed
1 stopDelta
7h 20mLGA-ONT
$128
9/1Sun
1 stopDelta
7h 13mEWR-ONT
$128
11/12Tue
1 stopDelta
8h 52mIAH-ONT
$129
11/12Tue
1 stopDelta
8h 22mHOU-ONT
$129
8/26Mon
1 stopDelta
7h 13mEWR-ONT
$133

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Flights to Ontario - Delta

Destination:

Ontario (ONT)United States

Return flight deals:

Ontario - United States

Cabin classes:

$443
First Class flights to Ontario
$478
Business Class flights to Ontario
$193
$35

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