Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Washington, D.C. Dulles Intl Airport to Los Angeles from $93

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to Los Angeles departing on 3/10. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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.
Delta Logo
7:05 am - 12:07 pm
IAD
-
ONT
8h 02m
1 stop
Delta Logo
10:20 pm - 9:13 am
ONT
-
IAD
7h 53m
1 stop
$257Delta
Tue, Feb 24 - Sat, Feb 28
Delta Logo
2:17 pm - 11:49 pm
IAD
-
ONT
12h 32m
2 stops
Delta Logo
1:15 pm - 12:21 am
ONT
-
IAD
8h 06m
1 stop
$262Delta
Tue, Feb 24 - Tue, Mar 3
Delta Logo
12:38 pm - 11:49 pm
IAD
-
ONT
14h 11m
2 stops
Delta Logo
10:20 pm - 4:28 pm
ONT
-
IAD
15h 08m
2 stops
$267Delta
Tue, Feb 24 - Tue, Mar 3
Alaska Airlines Logo
7:10 am - 2:32 pm
IAD
-
ONT
10h 22m
1 stop
Alaska Airlines Logo
10:39 am - 12:09 am
ONT
-
IAD
10h 30m
1 stop
$277Alaska Airlines
Tue, May 5 - Sat, May 9
United Airlines Logo
2:12 pm - 8:50 pm
IAD
-
ONT
9h 38m
1 stop
United Airlines Logo
6:37 pm - 6:51 am
ONT
-
IAD
9h 14m
1 stop
$288United Airlines
Wed, Feb 25 - Mon, Mar 2
Delta Logo
7:15 am - 12:02 pm
IAD
-
ONT
7h 47m
1 stop
Delta Logo
10:20 pm - 11:53 am
ONT
-
IAD
10h 33m
2 stops
$293Delta
Wed, Feb 25 - Mon, Mar 2
Delta Logo
3:00 pm - 9:00 pm
IAD
-
ONT
9h 00m
1 stop
Delta Logo
10:15 pm - 9:15 am
ONT
-
IAD
8h 00m
1 stop
$297Delta
Tue, Apr 14 - Sat, Apr 18
Delta Logo
6:00 am - 1:54 pm
IAD
-
ONT
10h 54m
2 stops
Delta Logo
10:25 pm - 9:10 am
ONT
-
IAD
7h 45m
1 stop
$302Delta
Wed, Mar 4 - Sat, Mar 14
American Airlines Logo
5:37 pm - 10:49 pm
IAD
-
ONT
8h 12m
1 stop
American Airlines Logo
10:36 pm - 8:48 am
ONT
-
IAD
7h 12m
1 stop
$305American Airlines
Mon, Mar 2 - Wed, Mar 11
American Airlines Logo
5:00 am - 4:22 pm
IAD
-
ONT
14h 22m
2 stops
American Airlines Logo
7:05 pm - 8:48 am
ONT
-
IAD
10h 43m
2 stops
$307American Airlines
Wed, Feb 25 - Wed, Mar 4

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

Our best United Airlines deals on Washington, D.C. Dulles Intl Airport to Ontario flight tickets
United Airlines
Feb 26
IAD6:20 amWashington, D.C. Dulles Intl
9h 18m
1 stop
ONT12:38 pmOntario
Mar 5
ONT1:40 pmOntario
8h 23m
1 stop
IAD1:03 amWashington, D.C. Dulles Intl
$319
United Airlines
Mar 4
IAD4:10 pmWashington, D.C. Dulles Intl
9h 47m
1 stop
ONT10:57 pmOntario
Mar 8
ONT11:59 pmOntario
8h 50m
1 stop
IAD11:49 amWashington, D.C. Dulles Intl
$338
United Airlines
May 20
IAD3:15 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
ONT10:30 pmOntario
May 27
ONT7:00 amOntario
8h 56m
1 stop
IAD6:56 pmWashington, D.C. Dulles Intl
$347

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
Feb 24
IAD7:05 amWashington, D.C. Dulles Intl
8h 02m
1 stop
ONT12:07 pmOntario
Feb 28
ONT10:20 pmOntario
7h 53m
1 stop
IAD9:13 amWashington, D.C. Dulles Intl
$257
Delta
Feb 24
IAD2:17 pmWashington, D.C. Dulles Intl
12h 32m
2 stops
ONT11:49 pmOntario
Mar 3
ONT1:15 pmOntario
8h 06m
1 stop
IAD12:21 amWashington, D.C. Dulles Intl
$262
Delta
Feb 24
IAD12:38 pmWashington, D.C. Dulles Intl
14h 11m
2 stops
ONT11:49 pmOntario
Mar 3
ONT10:20 pmOntario
15h 08m
2 stops
IAD4:28 pmWashington, D.C. Dulles Intl
$267

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated February 4, 2026.
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

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Tue 2/24

7:05 am-12:07 pm

1 stop8h 02m

Ontario

Sat 2/28

10:20 pm-9:13 am

1 stop7h 53m

$257

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Tue 2/24

2:17 pm-11:49 pm

2 stops12h 32m

Ontario

Tue 3/3

1:15 pm-12:21 am

1 stop8h 06m

$262

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Tue 2/24

12:38 pm-11:49 pm

2 stops14h 11m

Ontario

Tue 3/3

10:20 pm-4:28 pm

2 stops15h 08m

$267

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Tue 5/5

7:10 am-2:32 pm

1 stop10h 22m

Ontario

Sat 5/9

10:39 am-12:09 am

1 stop10h 30m

$277

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Wed 2/25

2:12 pm-8:50 pm

1 stop9h 38m

Ontario

Mon 3/2

6:37 pm-6:51 am

1 stop9h 14m

$288

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Wed 2/25

7:15 am-12:02 pm

1 stop7h 47m

Ontario

Mon 3/2

10:20 pm-11:53 am

2 stops10h 33m

$293

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Tue 4/14

3:00 pm-9:00 pm

1 stop9h 00m

Ontario

Sat 4/18

10:15 pm-9:15 am

1 stop8h 00m

$297

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Wed 3/4

6:00 am-1:54 pm

2 stops10h 54m

Ontario

Sat 3/14

10:25 pm-9:10 am

1 stop7h 45m

$302

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Mon 3/2

5:37 pm-10:49 pm

1 stop8h 12m

Ontario

Wed 3/11

10:36 pm-8:48 am

1 stop7h 12m

$305

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Wed 2/25

5:00 am-4:22 pm

2 stops14h 22m

Ontario

Wed 3/4

7:05 pm-8:48 am

2 stops10h 43m

$307

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Los Angeles from

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 cheapest month to fly to Ontario?

In general, September 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 $273. If you aren’t able to travel during the month of September, then book flights to Ontario from Washington, D.C. Dulles Intl Airport during August instead. Flights to Ontario in August, while not as cheap as those in September, still average around $329.

How far in advance should I book a flight 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 $433 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 $303 on momondo.

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

As of February 2026, prices for Washington, D.C. Dulles Intl Airport to Ontario flights are approximately 53% more expensive 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

Fastest flight time

6h 40m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Ontario takes 6h 40m
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

  • 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 6h 40m.

  • 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 $125Free CancellationRating
5.7
3,052 reviews
Search Frontier flights
DeltaPriceFrom $213Free CancellationRating
7.9
8,144 reviews
Search Delta flights
SouthwestPriceFrom $278Free CancellationRating
8.0
4,274 reviews
Search Southwest flights
United AirlinesPriceFrom $284Free CancellationRating
7.4
9,236 reviews
Search United Airlines flights
American AirlinesPriceFrom $298Free CancellationRating
7.2
11,222 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.

An easier way to manage your Ontario trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Fri 3/6
Fri 3/13
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States