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Cheap flights from Ontario to Washington, D.C. from $81

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Washington, D.C. departing on 5/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Washington, D.C.

Cheap round-trip flights

KAYAK's recommended round-trip deals from the most popular airlines that fly from Ontario to Washington, D.C..
Frontier Logo
3:17 pm - 4:28 pmONT-BWI
22h 11m1 stop
Frontier Logo
5:58 pm - 11:59 pmBWI-ONT
9h 01m1 stop
$222Frontier
Find Deal
Tue, Apr 15 - Mon, Apr 28
Frontier Logo
12:59 am - 12:09 pmONT-DCA
8h 10m1 stop
Frontier Logo
7:00 am - 11:26 amDCA-ONT
7h 26m1 stop
$235Frontier
Find Deal
Fri, Apr 25 - Fri, May 2
American Airlines Logo
10:40 pm - 9:39 amONT-BWI
7h 59m1 stop
American Airlines Logo
6:03 am - 11:50 amBWI-ONT
8h 47m1 stop
$289American Airlines
Find Deal
Tue, Apr 29 - Tue, May 6
American Airlines Logo
7:00 am - 7:29 pmONT-BWI
9h 29m2 stops
American Airlines Logo
3:29 pm - 9:58 pmBWI-ONT
9h 29m1 stop
$294American Airlines
Find Deal
Tue, Apr 29 - Tue, May 6
Delta Logo
1:20 pm - 11:31 pmONT-IAD
7h 11m1 stop
Delta Logo
6:00 am - 10:57 amIAD-ONT
7h 57m1 stop
$317Delta
Find Deal
Wed, Apr 23 - Sat, Apr 26
Delta Logo
12:07 pm - 9:36 pmONT-DCA
6h 29m1 stop
Delta Logo
4:00 pm - 10:36 pmDCA-ONT
9h 36m2 stops
$322Delta
Find Deal
Thu, Apr 24 - Wed, Apr 30
United Airlines Logo
5:00 am - 3:05 pmONT-BWI
7h 05m1 stop
United Airlines Logo
4:07 pm - 8:42 pmBWI-ONT
7h 35m1 stop
$323United Airlines
Find Deal
Sat, Apr 26 - Tue, Apr 29
United Airlines Logo
6:38 pm - 5:24 amONT-IAD
7h 46m1 stop
United Airlines Logo
6:32 am - 12:14 pmIAD-ONT
8h 42m1 stop
$331United Airlines
Find Deal
Sun, Jun 29 - Wed, Jul 2
Southwest Logo
11:50 am - 11:50 pmONT-DCA
9h 00m1 stop
Southwest Logo
6:05 am - 1:05 pmDCA-ONT
10h 00m2 stops
$367Southwest
Find Deal
Thu, Aug 14 - Sun, Aug 17
Southwest Logo
9:20 pm - 5:10 amONT-BWI
4h 50mnonstop
Southwest Logo
12:45 pm - 3:05 pmBWI-ONT
5h 20mnonstop
$368Southwest
Find Deal
Tue, Jul 8 - Tue, Jul 15

Frontier flights from Ontario to Washington, D.C.

Our best Frontier deals on Ontario to Washington, D.C. flight tickets
Frontier
Apr 15
ONT3:17 pmOntario
22h 11m
1 stop
BWI4:28 pmBaltimore/Washington
Apr 28
BWI5:58 pmBaltimore/Washington
9h 01m
1 stop
ONT11:59 pmOntario
Frontier
Apr 25
ONT12:59 amOntario
8h 10m
1 stop
DCA12:09 pmWashington, D.C. Reagan-National
May 2
DCA7:00 amWashington, D.C. Reagan-National
7h 26m
1 stop
ONT11:26 amOntario
Frontier
May 1
ONT12:16 pmOntario
6h 43m
1 stop
DCA9:59 pmWashington, D.C. Reagan-National
May 5
DCA7:00 amWashington, D.C. Reagan-National
7h 26m
1 stop
ONT11:26 amOntario

Alaska Airlines flights from Ontario to Washington, D.C.

Our best Alaska Airlines deals on Ontario to Washington, D.C. flight tickets
Alaska Airlines
May 3
ONT4:29 pmOntario
10h 17m
1 stop
BWI5:46 amBaltimore/Washington
May 6
BWI7:06 amBaltimore/Washington
11h 26m
1 stop
ONT3:32 pmOntario
Alaska Airlines
Apr 30
ONT4:29 pmOntario
10h 17m
1 stop
BWI5:46 amBaltimore/Washington
May 7
BWI7:06 amBaltimore/Washington
11h 26m
1 stop
ONT3:32 pmOntario
Alaska Airlines
May 1
ONT4:29 pmOntario
10h 17m
1 stop
BWI5:46 amBaltimore/Washington
May 3
BWI7:06 amBaltimore/Washington
11h 26m
1 stop
ONT3:32 pmOntario

See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Ontario to Washington, D.C.

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Ontario and Washington, D.C.?

What is the cheapest month to fly to Washington, D.C.?

The month of April is, on average, the cheapest month to fly to Washington, D.C. from Ontario, with most prices found around $256. If you’re not able to fly to Washington, D.C. in April, then August is your next best option. Flight prices from Ontario to Washington, D.C. during August average around $279.

What is the cheapest day to depart on your flight to Washington, D.C.?

On average, the least expensive day to fly to Washington, D.C. from Ontario is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $425. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Ontario to Washington, D.C. for around $586.

What is the cheapest time of day to depart on your flight to Washington, D.C.?

In the afternoon is the cheapest time of day to fly from Ontario to Washington, D.C. when you can find flight prices for as low as $377. Flying to Washington, D.C. in the afternoon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets at noon because they tend to be around $487. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest Ontario to Washington, D.C. flight route?

Fly from Ontario to Baltimore/Washington for the best Ontario - Washington, D.C. flight prices

How far in advance should I book a flight to Washington, D.C.?

You are more likely to see cheaper flights to Washington, D.C. from Ontario when booking 13 weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around $450 when searching 13 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. from Ontario for as low as $350 on momondo.

What cabin class options are available on Ontario to Washington, D.C. flights?

There are 1 cabin classes available to choose from on Ontario to Washington, D.C. flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Ontario to Washington, D.C. flight prices changed over time?

As of April 2025, prices for Ontario to Washington, D.C. flights are approximately 11% cheaper when compared to flights at the same time last year.

When to book flights from Ontario to Washington, D.C.

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to Washington, D.C. according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to Washington, D.C. (ONT to WAS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Washington, D.C.

Best Price Found

$81

Fastest flight time

4h 50m

Direct flights

Wed, Thu, Fri and Sat

Airports in Washington, D.C.

3 airports
The best one-way flight to Washington, D.C. from Ontario in the past 72 hours is $81. The best round-trip flight deal from Ontario to Washington, D.C. found on momondo in the last 72 hours is $222.
The fastest flight from Ontario to Washington, D.C. takes 4h 50m
Direct flights go from Ontario to Washington, D.C. on Wednesday, Thursday, Friday and Saturday. The only airline offering direct flights is Southwest.
There are 3 airports near Washington, D.C.: Washington, D.C. Reagan-National (DCA), Baltimore/Washington (BWI), Washington, D.C. Dulles Intl (IAD)

  • How far is Ontario to Washington, D.C. by plane?

    Ontario and Washington, D.C. are 2260.6 mi apart from one another. In terms of flight time, this usually takes a little over 4h 50m.

  • When did momondo last update prices for flights from Ontario Airport to Washington, D.C.?

    Prices for flights from Ontario Airport to Washington, D.C. are refreshed on a daily basis.

  • How many operators does momondo search for flights from Ontario Airport to Washington, D.C.?

  • How old do you have to be to fly from Ontario Airport to Washington, D.C.?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Washington, D.C..

  • What documentation or ID do you need to fly to Washington, D.C.?

    The required travel and health documents for your Washington, D.C. trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C.. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Ontario to Washington, D.C.?

  • What is the most popular airline from Ontario to Washington, D.C.?


Best airlines flying from Ontario to Washington, D.C.

Compare and see reviews for airlines that fly from Ontario to Washington, D.C. with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $130Free CancellationRating
6.3
7,888 reviews
Search Spirit Airlines flights
FrontierPriceFrom $133Free CancellationRating
5.9
3,276 reviews
Search Frontier flights
United AirlinesPriceFrom $256Free CancellationRating
7.4
8,616 reviews
Search United Airlines flights
DeltaPriceFrom $286Free CancellationRating
8.0
7,897 reviews
Search Delta flights
American AirlinesPriceFrom $286Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $321Free CancellationRating
8.0
4,272 reviews
Search Southwest flights

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Arlington
Gettysburg
National Harbor
Laurel
Silver Spring
Woodbridge
Tysons
Fredericksburg
Waldorf
Manassas
Gaithersburg
Glen Burnie
Linthicum Heights
Rockville
Fairfax
Towson
Reston
Hyattsville
Hanover

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Washington, D.C.?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to Washington, D.C.. momondo saves you time and could save you money on your trip.

Can I find flights from Ontario to Washington, D.C. with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Ontario to Washington, D.C. flights to just show those with flexible booking policies.

How can momondo help me find flights from Ontario to Washington, D.C.?

momondo helps you find the best flight between Ontario and Washington, D.C. by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Ontario to Washington, D.C. right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Ontario to Washington, D.C. flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.


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1 adult
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Mon 4/7
Mon 4/14

Find better results for your trip to the United States

Fly into one of these airports located in Washington, D.C.

Airports listed have a maximum distance of 22.4 mi from Washington, D.C.