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$109 Find cheap flights from District of Columbia 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 8/24. 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

$109
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 Reagan Washington National Airport to Ontario

FAQs for booking flights from District of Columbia to Ontario

  • How does KAYAK find such low prices on flights from District of Columbia 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 District of Columbia to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from District of Columbia 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 District of Columbia 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 District of Columbia with another airline.

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

Find which airlines fly direct from District of Columbia to Ontario, which days they fly and book direct flights.

Nonstop departures

District of Columbia 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 District of Columbia

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 District of Columbia to Ontario

Recent round-trip flight deals

8/27Tue
1 stopFrontier
7h 40mDCA-ONT
9/3Tue
1 stopFrontier
19h 37mONT-DCA
$205
8/13Tue
1 stopFrontier
19h 39mDCA-ONT
8/21Wed
1 stopFrontier
12h 42mONT-DCA
$207
8/14Wed
1 stopAmerican Airlines
10h 13mIAD-ONT
8/19Mon
1 stopAmerican Airlines
7h 14mONT-IAD
$287
9/6Fri
1 stopAmerican Airlines
9h 54mIAD-ONT
9/10Tue
1 stopAmerican Airlines
7h 22mONT-IAD
$289
8/15Thu
1 stopUnited Airlines
11h 09mIAD-ONT
8/19Mon
1 stopUnited Airlines
7h 59mONT-IAD
$290
9/10Tue
1 stopAlaska Airlines
9h 07mIAD-ONT
9/17Tue
1 stopAlaska Airlines
10h 49mONT-IAD
$298
11/26Tue
1 stopDelta
9h 47mIAD-ONT
12/3Tue
1 stopDelta
7h 00mONT-IAD
$304
9/21Sat
1 stopDelta
7h 12mIAD-ONT
9/23Mon
2 stopsDelta
10h 11mONT-IAD
$309
9/21Sat
1 stopUnited Airlines
9h 33mIAD-ONT
9/22Sun
1 stopUnited Airlines
7h 59mONT-IAD
$323
9/10Tue
1 stopAlaska Airlines
9h 07mIAD-ONT
9/18Wed
1 stopAlaska Airlines
10h 49mONT-IAD
$378

Search by stops

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Recent one-way flight deals

8/24Sat
1 stopFrontier
7h 45mDCA-ONT
$109
9/17Tue
1 stopFrontier
8h 32mDCA-ONT
$110
6/18Tue
2 stopsDelta
12h 33mDCA-ONT
$133
9/6Fri
1 stopAmerican Airlines
9h 54mIAD-ONT
$144
8/24Sat
1 stopDelta
7h 13mIAD-ONT
$145
10/1Tue
2 stopsAmerican Airlines
14h 13mIAD-ONT
$149
9/19Thu
1 stopUnited Airlines
9h 36mDCA-ONT
$195
7/2Tue
1 stopUnited Airlines
8h 14mIAD-ONT
$195
8/6Tue
2 stopsAlaska Airlines
15h 33mIAD-ONT
$201
9/17Tue
2 stopsAlaska Airlines
14h 15mDCA-ONT
$204

Search by stops

Search by airline

Search by price

Last minute flights from District of Columbia to Ontario

Last minute flight, train and bus deals

6/4Tue
multi-stopFrontier
19h 59mDCA-ONT
6/14Fri
multi-stopFrontier
18h 13mONT-DCA
$299
6/4Tue
multi-stopFrontier
8h 02mDCA-ONT
6/12Wed
multi-stopFrontier
10h 54mONT-DCA
$305
6/4Tue
multi-stopDelta
8h 07mIAD-ONT
6/11Tue
multi-stopDelta
7h 45mONT-IAD
$400
6/4Tue
multi-stopDelta
8h 07mIAD-ONT
6/12Wed
multi-stopDelta
7h 45mONT-IAD
$511
6/4Tue
multi-stopUnited Airlines
7h 43mIAD-ONT
6/18Tue
multi-stopUnited Airlines
8h 00mONT-IAD
$537
6/3Mon
multi-stopAmerican Airlines
7h 45mIAD-ONT
6/5Wed
multi-stopAmerican Airlines
7h 13mONT-IAD
$551
6/1Sat
multi-stopAmerican Airlines
9h 39mIAD-ONT
6/5Wed
multi-stopAmerican Airlines
7h 13mONT-IAD
$553
6/3Mon
multi-stopAlaska Airlines
9h 21mIAD-ONT
6/5Wed
multi-stopAlaska Airlines
10h 59mONT-IAD
$554
6/3Mon
multi-stopAlaska Airlines
10h 26mDCA-ONT
6/5Wed
multi-stopAlaska Airlines
8h 59mONT-DCA
$574
6/3Mon
multi-stopUnited Airlines
11h 04mIAD-ONT
6/10Mon
multi-stopUnited Airlines
8h 00mONT-IAD
$654

Search by stops

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Flights to Ontario

Destination:

Ontario (ONT)United States

Return flight deals:

Ontario - District of Columbia

Cabin classes: