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Find cheap flights from District of Columbia to Ontario from $84

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 5/18. 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
Wed 6/5
Wed 6/12

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In the last 7 days travelers have searched 42,830,901 times on KAYAK, and here is why:

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Good to know

Low season

January

High season

May

Cheapest flight

$84
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly and prices are also 8% 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

8/20Tue
1 stopFrontier
7h 40mDCA-ONT
8/26Mon
1 stopFrontier
21h 30mONT-DCA
$217
8/16Fri
1 stopFrontier
13h 40mDCA-ONT
8/20Tue
1 stopFrontier
19h 37mONT-DCA
$218
6/1Sat
1 stopAmerican Airlines
10h 02mIAD-ONT
6/8Sat
1 stopAmerican Airlines
7h 13mONT-IAD
$288
8/24Sat
1 stopDelta
6h 55mIAD-ONT
8/26Mon
1 stopDelta
8h 53mONT-IAD
$290
5/31Fri
1 stopAmerican Airlines
7h 45mIAD-ONT
6/12Wed
2 stopsAmerican Airlines
9h 44mONT-IAD
$292
10/31Thu
1 stopDelta
8h 22mDCA-ONT
11/2Sat
2 stopsDelta
12h 54mONT-DCA
$295
7/31Wed
1 stopUnited Airlines
8h 14mIAD-ONT
8/3Sat
1 stopUnited Airlines
8h 00mONT-IAD
$312
6/4Tue
1 stopUnited Airlines
8h 45mIAD-ONT
6/11Tue
1 stopUnited Airlines
8h 00mONT-IAD
$390
9/24Tue
1 stopAlaska Airlines
9h 07mIAD-ONT
10/1Tue
1 stopAlaska Airlines
28h 59mONT-IAD
$442
6/11Tue
1 stopAlaska Airlines
19h 58mIAD-ONT
6/18Tue
1 stopAlaska Airlines
8h 10mONT-IAD
$462

Search by stops

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Recent one-way flight deals

5/18Sat
1 stopFrontier
8h 02mDCA-ONT
$84
8/27Tue
1 stopFrontier
7h 40mDCA-ONT
$109
6/10Mon
1 stopAmerican Airlines
8h 28mDCA-ONT
$144
5/29Wed
1 stopAmerican Airlines
10h 11mIAD-ONT
$144
6/1Sat
1 stopDelta
8h 39mDCA-ONT
$145
6/15Sat
1 stopDelta
7h 20mIAD-ONT
$145
9/17Tue
1 stopAlaska Airlines
9h 07mIAD-ONT
$147
8/29Thu
1 stopUnited Airlines
9h 36mDCA-ONT
$195
5/29Wed
1 stopUnited Airlines
11h 06mIAD-ONT
$195
6/11Tue
1 stopAlaska Airlines
19h 58mIAD-ONT
$217

Search by stops

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Last minute flights from District of Columbia to Ontario

Last minute flight, train and bus deals

5/8Wed
multi-stopFrontier
26h 26mDCA-ONT
5/14Tue
multi-stopFrontier
8h 01mONT-DCA
$280
5/8Wed
multi-stopFrontier
19h 59mDCA-ONT
5/15Wed
multi-stopFrontier
25h 37mONT-DCA
$288
5/8Wed
multi-stopFrontier
19h 59mDCA-ONT
5/13Mon
multi-stopFrontier
8h 01mONT-DCA
$293
5/11Sat
multi-stopAmerican Airlines
8h 02mIAD-ONT
5/25Sat
multi-stopAmerican Airlines
8h 45mONT-IAD
$455
5/11Sat
multi-stopAmerican Airlines
11h 50mIAD-ONT
5/25Sat
multi-stopAmerican Airlines
8h 45mONT-IAD
$459
5/11Sat
multi-stopDelta
8h 07mIAD-ONT
5/24Fri
multi-stopDelta
7h 33mONT-IAD
$521
5/7Tue
multi-stopUnited Airlines
7h 25mIAD-ONT
5/21Tue
multi-stopUnited Airlines
10h 08mONT-IAD
$557
5/11Sat
multi-stopDelta
11h 15mIAD-ONT
5/25Sat
multi-stopDelta
14h 14mONT-IAD
$561
5/9Thu
multi-stop
7h 57mDCA-ONT
5/13Mon
multi-stop
10h 26mONT-DCA
$561
5/10Fri
multi-stopUnited Airlines
17h 17mIAD-ONT
5/25Sat
multi-stopUnited Airlines
6h 35mONT-IAD
$676

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Flights to Ontario

Destination:

Ontario (ONT)United States

Return flight deals:

Ontario - District of Columbia

Cabin classes: