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Cheap flights from Washington, D.C. Dulles Intl Airport to Los Angeles from $110

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
12:06 pm - 10:17 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
13h 11m2 stops Atlanta Hartsfield-Jackson Denver Intl
Frontier Logo
6:00 am - 6:51 amONT  Ontario-IAD Washington, D.C. Dulles Intl
21h 51m2 stops Denver Intl Atlanta Hartsfield-Jackson
$219Frontier
Wed, Dec 9 - Wed, Dec 16
Frontier Logo
1:09 pm - 8:30 amIAD  Washington, D.C. Dulles Intl-ONT Ontario
22h 21m1 stop Las Vegas Harry Reid Intl
Frontier Logo
10:23 am - 8:12 pmONT  Ontario-IAD Washington, D.C. Dulles Intl
6h 49m1 stop Dallas/Fort Worth
$233Frontier
Mon, Nov 23 - Wed, Dec 2
Multiple Airlines Logo
1:09 pm - 7:36 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
9h 27m1 stop Las Vegas Harry Reid Intl
Multiple Airlines Logo
5:01 pm - 5:35 amONT  Ontario-IAD Washington, D.C. Dulles Intl
9h 34m1 stop Seattle/Tacoma Intl
$287Multiple Airlines
Thu, Nov 26 - Thu, Dec 10
Multiple Airlines Logo
7:46 am - 3:13 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
10h 27m1 stop Seattle/Tacoma Intl
Multiple Airlines Logo
10:40 pm - 5:10 amONT  Ontario-IAD Washington, D.C. Dulles Intl
27h 30m1 stop Las Vegas Harry Reid Intl
$342Multiple Airlines
Tue, Nov 17 - Tue, Nov 24
United Airlines Logo
1:00 pm - 6:50 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
8h 50m1 stop Chicago O'Hare Intl
United Airlines Logo
1:42 pm - 11:26 pmONT  Ontario-IAD Washington, D.C. Dulles Intl
6h 44m1 stop Denver Intl
$351United Airlines
Sat, Jan 16 - Sat, Jan 23
United Airlines Logo
2:11 pm - 9:00 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
9h 49m1 stop Denver Intl
United Airlines Logo
9:45 am - 8:55 pmONT  Ontario-IAD Washington, D.C. Dulles Intl
8h 10m1 stop San Francisco
$351United Airlines
Mon, Jan 11 - Wed, Jan 13
American Airlines Logo
7:00 am - 1:28 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
9h 28m1 stop Dallas/Fort Worth
American Airlines Logo
10:38 am - 10:55 pmONT  Ontario-IAD Washington, D.C. Dulles Intl
9h 17m1 stop Dallas/Fort Worth
$351American Airlines
Wed, Jan 27 - Mon, Feb 1
Delta Logo
7:05 am - 12:12 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
8h 07m1 stop Salt Lake City
Delta Logo
1:20 pm - 11:31 pmONT  Ontario-IAD Washington, D.C. Dulles Intl
7h 11m1 stop Salt Lake City
$351Delta
Sat, Feb 6 - Mon, Feb 8
Delta Logo
7:00 am - 12:17 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
8h 17m1 stop Salt Lake City
Delta Logo
11:14 am - 10:56 pmONT  Ontario-IAD Washington, D.C. Dulles Intl
8h 42m1 stop Atlanta Hartsfield-Jackson
$351Delta
Mon, Dec 14 - Thu, Dec 24
American Airlines Logo
7:14 am - 1:24 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
9h 10m1 stop Dallas/Fort Worth
American Airlines Logo
1:02 pm - 11:30 pmONT  Ontario-IAD Washington, D.C. Dulles Intl
7h 28m1 stop Dallas/Fort Worth
$396American Airlines
Wed, Dec 2 - Sun, Dec 6

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Frontier flights from Washington, D.C. Dulles Intl Airport to Ontario

Our best Frontier deals on Washington, D.C. Dulles Intl Airport to Ontario flight tickets
Frontier
Dec 9
IAD12:06 pmWashington, D.C. Dulles Intl
13h 11m
2 stops
ONT10:17 pmOntario
Dec 16
ONT6:00 amOntario
21h 51m
2 stops
IAD6:51 amWashington, D.C. Dulles Intl
$219
Frontier
Nov 23
IAD1:09 pmWashington, D.C. Dulles Intl
22h 21m
1 stop
ONT8:30 amOntario
Dec 2
ONT10:23 amOntario
6h 49m
1 stop
IAD8:12 pmWashington, D.C. Dulles Intl
$233
Frontier
Nov 26
IAD1:09 pmWashington, D.C. Dulles Intl
9h 27m
1 stop
ONT7:36 pmOntario
Dec 2
ONT10:23 amOntario
6h 49m
1 stop
IAD8:12 pmWashington, D.C. Dulles Intl
$236

Delta flights from Washington, D.C. Dulles Intl Airport to Ontario

Our best Delta deals on Washington, D.C. Dulles Intl Airport to Ontario flight tickets
Delta
Nov 17
IAD6:00 amWashington, D.C. Dulles Intl
8h 03m
1 stop
ONT11:03 amOntario
Nov 26
ONT7:05 amOntario
7h 35m
1 stop
IAD5:40 pmWashington, D.C. Dulles Intl
$402
Delta
Nov 17
IAD6:00 amWashington, D.C. Dulles Intl
8h 03m
1 stop
ONT11:03 amOntario
Nov 24
ONT11:57 amOntario
9h 23m
1 stop
IAD12:20 amWashington, D.C. Dulles Intl
$426
Delta
Nov 17
IAD7:00 amWashington, D.C. Dulles Intl
8h 17m
1 stop
ONT12:17 pmOntario
Jan 10
ONT1:07 pmOntario
8h 44m
1 stop
IAD12:51 amWashington, D.C. Dulles Intl
$437

momondo Fare Finder

 
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Ontario

IAD Washington, D.C. Dulles Intl - ONT Ontario

IADONT

Washington, D.C. Dulles Intl

Wed 12/9

12:06 pm-10:17 pm

2 stops13h 11m

Ontario

Wed 12/16

6:00 am-6:51 am

2 stops21h 51m

$219

Washington, D.C.Ontario

IAD Washington, D.C. Dulles Intl - ONT Ontario

IADONT

Washington, D.C. Dulles Intl

Mon 11/23

1:09 pm-8:30 am

1 stop22h 21m

Ontario

Wed 12/2

10:23 am-8:12 pm

1 stop6h 49m

$233

Washington, D.C.Ontario

IAD Washington, D.C. Dulles Intl - ONT Ontario

IADONT

Washington, D.C. Dulles Intl

Thu 11/26

1:09 pm-7:36 pm

1 stop9h 27m

Ontario

Thu 12/10

5:01 pm-5:35 am

1 stop9h 34m

$287

Washington, D.C.Ontario

IAD Washington, D.C. Dulles Intl - ONT Ontario

IADONT

Washington, D.C. Dulles Intl

Tue 11/17

7:46 am-3:13 pm

1 stop10h 27m

Ontario

Tue 11/24

10:40 pm-5:10 am

1 stop27h 30m

$342

Washington, D.C.Ontario

IAD Washington, D.C. Dulles Intl - ONT Ontario

IADONT

Washington, D.C. Dulles Intl

Sat 1/16

1:00 pm-6:50 pm

1 stop8h 50m

Ontario

Sat 1/23

1:42 pm-11:26 pm

1 stop6h 44m

$351

Washington, D.C.Ontario

IAD Washington, D.C. Dulles Intl - ONT Ontario

IADONT

Washington, D.C. Dulles Intl

Mon 1/11

2:11 pm-9:00 pm

1 stop9h 49m

Ontario

Wed 1/13

9:45 am-8:55 pm

1 stop8h 10m

$351

Washington, D.C.Ontario

IAD Washington, D.C. Dulles Intl - ONT Ontario

IADONT

Washington, D.C. Dulles Intl

Wed 1/27

7:00 am-1:28 pm

1 stop9h 28m

Ontario

Mon 2/1

10:38 am-10:55 pm

1 stop9h 17m

$351
Quickest round-trip

Washington, D.C.Ontario

IAD Washington, D.C. Dulles Intl - ONT Ontario

IADONT

Washington, D.C. Dulles Intl

Sat 2/6

7:05 am-12:12 pm

1 stop8h 07m

Ontario

Mon 2/8

1:20 pm-11:31 pm

1 stop7h 11m

$351

Washington, D.C.Ontario

IAD Washington, D.C. Dulles Intl - ONT Ontario

IADONT

Washington, D.C. Dulles Intl

Mon 12/14

7:00 am-12:17 pm

1 stop8h 17m

Ontario

Thu 12/24

11:14 am-10:56 pm

1 stop8h 42m

$351

Washington, D.C.Ontario

IAD Washington, D.C. Dulles Intl - ONT Ontario

IADONT

Washington, D.C. Dulles Intl

Wed 12/2

7:14 am-1:24 pm

1 stop9h 10m

Ontario

Sun 12/6

1:02 pm-11:30 pm

1 stop7h 28m

$396

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to Ontario

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 Washington, D.C. Dulles Intl Airport and Ontario?

Prices are currently low for flights on this route.

Typical prices usually range from $337 to $733.
The lowest price recently found on this route was $207.

What is the cheapest month to fly to Ontario?

In general, January is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $345. If you aren’t able to travel during the month of January, then book flights to Ontario from Washington, D.C. Dulles Intl Airport during February instead. Flights to Ontario in February, while not as cheap as those in January, still average around $357.

How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to Ontario?

You are more likely to see cheaper flights to Ontario from Washington, D.C. Dulles Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $523 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from Washington, D.C. Dulles Intl Airport for as low as $315 on momondo.

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

As of November 2026, prices for Washington, D.C. Dulles Intl Airport to Ontario flights are approximately 33% cheaper when compared to flights at the same time last year.

When to book flights from Washington, D.C. Dulles Intl Airport to Ontario

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

Cheap Washington, D.C. Dulles Intl Airport to Ontario (IAD to ONT) flight deals and tips

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

Best Price Found

$110

Fastest flight time

7h 27m

Direct flights

None
The best one-way flight to Ontario from Washington, D.C. Dulles Intl Airport in the past 72 hours is $110. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to Ontario found on momondo in the last 72 hours is $219.
The fastest flight from Washington, D.C. Dulles Intl Airport to Ontario takes 7h 27m
There are no direct flights from Washington, D.C. Dulles Intl Airport to Ontario. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to Ontario.
Search flight deals

Frequently asked questions about flying from Washington, D.C. Dulles Intl Airport to Ontario

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

    There are 2238.2 mi between Washington, D.C. Dulles Intl and Ontario. In terms of flight time, this usually takes a little over 7h 27m.

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

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

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

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

    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 Washington, D.C. Dulles Intl Airport to Ontario Airport.

  • What documentation or ID do you need to fly to Ontario Airport?

    The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

Best airlines flying from Washington, D.C. Dulles Intl Airport to Ontario

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Ontario with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $178Free CancellationRating
5.5
2,512 reviews
Search Frontier flights
DeltaPriceFrom $269Free CancellationRating
7.8
8,699 reviews
Search Delta flights
SouthwestPriceFrom $278Free CancellationRating
8.0
4,215 reviews
Search Southwest flights
United AirlinesPriceFrom $323Free CancellationRating
7.3
10,460 reviews
Search United Airlines flights
American AirlinesPriceFrom $340Free CancellationRating
7.0
12,228 reviews
Search American Airlines flights

Why use momondo?

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

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

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

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

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

momondo provides multiple filters to help you find the best flight to Ontario from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Yes. momondo can track prices for Washington, D.C. to Ontario 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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