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$39 Find cheap flights from Washington to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Ontario departing on 8/28. 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
Sat 6/29
Sat 7/6

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In the last 7 days travelers have searched 42,686,544 times on KAYAK, and here is why:

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Good to know

Low season

January

High season

May

Cheapest flight

$39
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly and prices are also 10% lower on average.
Flight from Portland to Ontario

FAQs for booking flights from Washington to Ontario

  • How does KAYAK find such low prices on flights from Washington to Ontario?

    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 Washington to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Washington 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 Washington to Ontario?

    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 Ontario with an airline and back to Washington with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington to Ontario?

    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 Ontario from Washington up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Prefer to fly non-stop from Washington to Ontario?

Find which airlines fly direct from Washington to Ontario, which days they fly and book direct flights.

Nonstop departures

Washington to Ontario

Monday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Tuesday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Wednesday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Thursday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Friday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Saturday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Sunday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

See more direct flights

Nonstop returns

Ontario to Washington

Monday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Tuesday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Wednesday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Thursday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

Friday

Aeromexico, Air Canada, Air France, +22 more

Aeromexico, Air Canada, +23 more

Saturday

Aeromexico, Air Canada, Air France, +23 more

Aeromexico, Air Canada, +24 more

Sunday

Aeromexico, Air Canada, Air France, +24 more

Aeromexico, Air Canada, +25 more

See more direct flights
See more direct flights

Book cheap flights from Washington to Ontario

Recent round-trip flight deals

6/11Tue
nonstopFrontier
2h 15mPDX-ONT
6/13Thu
nonstopFrontier
2h 15mONT-PDX
$58
6/13Thu
nonstopFrontier
2h 15mPDX-ONT
6/26Wed
nonstopFrontier
2h 15mONT-PDX
$59
10/19Sat
nonstop
2h 21mPDX-ONT
10/22Tue
1 stop
4h 51mONT-PDX
$132
7/2Tue
nonstop
2h 35mSEA-ONT
7/5Fri
nonstop
2h 36mONT-SEA
$143
7/9Tue
nonstopDelta
2h 47mSEA-ONT
7/10Wed
nonstopDelta
2h 46mONT-SEA
$157
7/9Tue
1 stopDelta
6h 45mSEA-ONT
7/10Wed
nonstopDelta
2h 44mONT-SEA
$167
7/14Sun
nonstopAlaska Airlines
2h 35mSEA-ONT
7/17Wed
nonstopAlaska Airlines
2h 35mONT-SEA
$187
9/1Sun
nonstopAlaska Airlines
2h 35mSEA-ONT
9/6Fri
nonstopAlaska Airlines
2h 38mONT-SEA
$197
9/1Sun
1 stopUnited Airlines
7h 02mPSC-ONT
9/6Fri
1 stopUnited Airlines
4h 52mONT-PSC
$393
7/28Sun
2 stopsUnited Airlines
17h 52mGEG-ONT
8/13Tue
1 stopUnited Airlines
7h 23mONT-GEG
$463

Search by stops

Search by airline

Search by price

Recent one-way flight deals

8/28Wed
nonstopFrontier
2h 21mPDX-ONT
$39
9/28Sat
nonstopFrontier
2h 21mPDX-ONT
$40
8/27Tue
1 stopDelta
4h 29mSEA-ONT
$88
7/10Wed
1 stopDelta
4h 53mPDX-ONT
$98
9/27Fri
nonstopAlaska Airlines
2h 16mPDX-ONT
$99
6/27Thu
1 stopAlaska Airlines
6h 14mPDX-ONT
$108
7/2Tue
1 stopUnited Airlines
4h 48mSEA-ONT
$123
7/11Thu
1 stopUnited Airlines
6h 45mPDX-ONT
$124
6/7Fri
1 stopAmerican Airlines
6h 55mPDX-ONT
$152
8/28Wed
1 stopAmerican Airlines
12h 31mSEA-ONT
$287

Search by stops

Search by airline

Search by price

Last minute flights from Washington to Ontario

Last minute flight, train and bus deals

6/2Sun
nonstopFrontier
2h 15mPDX-ONT
6/10Mon
nonstopFrontier
2h 15mONT-PDX
$96
6/4Tue
nonstopFrontier
2h 44mSEA-ONT
6/5Wed
nonstopFrontier
2h 53mONT-SEA
$98
6/3Mon
nonstopFrontier
2h 15mPDX-ONT
6/6Thu
nonstopFrontier
2h 15mONT-PDX
$99
6/2Sun
multi-stopDelta
4h 53mPDX-ONT
6/26Wed
multi-stopDelta
6h 31mONT-PDX
$263
6/4Tue
multi-stopDelta
6h 22mPDX-ONT
6/25Tue
multi-stopDelta
6h 54mONT-PDX
$294
6/3Mon
multi-stopSouthwest
9h 35mPDX-ONT
6/6Thu
multi-stopSouthwest
4h 45mONT-PDX
$344
6/3Mon
multi-stopSouthwest
11h 15mPDX-ONT
6/6Thu
multi-stopSouthwest
4h 45mONT-PDX
$349
6/3Mon
multi-stopUnited Airlines
4h 50mPDX-ONT
6/8Sat
multi-stopUnited Airlines
5h 07mONT-PDX
$360
6/3Mon
nonstop
2h 15mPDX-ONT
6/6Thu
nonstop
2h 23mONT-PDX
$370
6/3Mon
multi-stopUnited Airlines
6h 33mPDX-ONT
6/6Thu
multi-stopUnited Airlines
4h 33mONT-PDX
$394

Search by stops

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Flights to Ontario

Destination:

Ontario (ONT)United States

Return flight deals:

Ontario - Washington

Cabin classes:

$443
$496
$466
$58