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Cheap flights from Washington, D.C. Dulles Intl Airport to Los Angeles from $88

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 11/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Los Angeles

Cheap round-trip flights

Frontier Logo
10:17 am - 3:39 pmIAD-ONT
8h 22m1 stop
Frontier Logo
4:09 pm - 9:17 amONT-IAD
14h 08m1 stop
$163Frontier
Find Deal
Thu, Oct 2 - Sun, Oct 5
American Airlines Logo
6:45 am - 11:57 amIAD-ONT
8h 12m1 stop
American Airlines Logo
6:10 am - 4:11 pmONT-IAD
7h 01m1 stop
$186American Airlines
Find Deal
Sat, Nov 1 - Sat, Nov 8
Frontier Logo
10:17 am - 3:39 pmIAD-ONT
8h 22m1 stop
Frontier Logo
7:15 pm - 12:55 pmONT-IAD
14h 40m2 stops
$200Frontier
Find Deal
Thu, Oct 2 - Sun, Oct 5
Multiple Airlines Logo
6:25 am - 12:37 pmIAD-ONT
9h 12m1 stop
Multiple Airlines Logo
4:17 pm - 9:09 amONT-IAD
13h 52m1 stop
$262Multiple Airlines
Find Deal
Tue, Oct 21 - Thu, Oct 23
Multiple Airlines Logo
6:25 am - 12:37 pmIAD-ONT
9h 12m1 stop
Multiple Airlines Logo
4:17 pm - 9:09 amONT-IAD
13h 52m1 stop
$263Multiple Airlines
Find Deal
Tue, Oct 21 - Thu, Oct 23
Delta Logo
6:15 am - 12:16 pmIAD-ONT
9h 01m1 stop
Delta Logo
10:00 pm - 10:11 amONT-IAD
9h 11m1 stop
$277Delta
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Thu, Oct 30 - Fri, Nov 7
Delta Logo
6:15 am - 12:14 pmIAD-ONT
8h 59m1 stop
Delta Logo
10:00 pm - 1:37 pmONT-IAD
12h 37m2 stops
$282Delta
Find Deal
Tue, Oct 14 - Fri, Oct 17
United Airlines Logo
4:10 pm - 10:51 pmIAD-ONT
9h 41m1 stop
United Airlines Logo
6:38 pm - 5:27 amONT-IAD
7h 49m1 stop
$310United Airlines
Find Deal
Sat, Nov 1 - Sat, Nov 8
United Airlines Logo
4:10 pm - 10:51 pmIAD-ONT
9h 41m1 stop
United Airlines Logo
7:00 am - 5:30 pmONT-IAD
7h 30m1 stop
$313United Airlines
Find Deal
Wed, Nov 5 - Sat, Nov 8
Southwest Logo
7:40 am - 4:40 pmIAD-ONT
12h 00m2 stops
Southwest Logo
2:15 pm - 11:30 pmONT-IAD
6h 15m1 stop
$323Southwest
Find Deal
Tue, Oct 21 - Thu, Oct 23

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

Our best Hawaiian Airlines deals on Washington, D.C. Dulles Intl Airport to Ontario flight tickets
Hawaiian Airlines
Nov 1
IAD7:43 amWashington, D.C. Dulles Intl
10h 34m
1 stop
ONT3:17 pmOntario
Nov 8
ONT4:11 pmOntario
11h 12m
1 stop
IAD6:23 amWashington, D.C. Dulles Intl
$305
Find similar
Hawaiian Airlines
Oct 30
IAD7:43 amWashington, D.C. Dulles Intl
10h 34m
1 stop
ONT3:17 pmOntario
Nov 3
ONT6:11 pmOntario
9h 12m
1 stop
IAD6:23 amWashington, D.C. Dulles Intl
$318
Find similar
Hawaiian Airlines
Oct 30
IAD7:43 amWashington, D.C. Dulles Intl
10h 34m
1 stop
ONT3:17 pmOntario
Nov 5
ONT4:11 pmOntario
11h 12m
1 stop
IAD6:23 amWashington, D.C. Dulles Intl
$351
Find similar

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
Nov 1
IAD4:10 pmWashington, D.C. Dulles Intl
9h 41m
1 stop
ONT10:51 pmOntario
Nov 8
ONT6:38 pmOntario
7h 49m
1 stop
IAD5:27 amWashington, D.C. Dulles Intl
$310
Find similar
United Airlines
Nov 5
IAD4:10 pmWashington, D.C. Dulles Intl
9h 41m
1 stop
ONT10:51 pmOntario
Nov 8
ONT7:00 amOntario
7h 30m
1 stop
IAD5:30 pmWashington, D.C. Dulles Intl
$313
Find similar
United Airlines
Nov 1
IAD4:10 pmWashington, D.C. Dulles Intl
9h 41m
1 stop
ONT10:51 pmOntario
Nov 8
ONT6:38 pmOntario
7h 49m
1 stop
IAD5:27 amWashington, D.C. Dulles Intl
$325
Find similar

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 September 17, 2025.
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

Thu 10/2

10:17 am-3:39 pm

1 stop8h 22m

Ontario

Sun 10/5

4:09 pm-9:17 am

1 stop14h 08m

$163

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Sat 11/1

6:45 am-11:57 am

1 stop8h 12m

Ontario

Sat 11/8

6:10 am-4:11 pm

1 stop7h 01m

$186

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Thu 10/2

10:17 am-3:39 pm

1 stop8h 22m

Ontario

Sun 10/5

7:15 pm-12:55 pm

2 stops14h 40m

$200

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Tue 10/21

6:25 am-12:37 pm

1 stop9h 12m

Ontario

Thu 10/23

4:17 pm-9:09 am

1 stop13h 52m

$262

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Tue 10/21

6:25 am-12:37 pm

1 stop9h 12m

Ontario

Thu 10/23

4:17 pm-9:09 am

1 stop13h 52m

$263

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Thu 10/30

6:15 am-12:16 pm

1 stop9h 01m

Ontario

Fri 11/7

10:00 pm-10:11 am

1 stop9h 11m

$277

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Tue 10/14

6:15 am-12:14 pm

1 stop8h 59m

Ontario

Fri 10/17

10:00 pm-1:37 pm

2 stops12h 37m

$282

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Sat 11/1

4:10 pm-10:51 pm

1 stop9h 41m

Ontario

Sat 11/8

6:38 pm-5:27 am

1 stop7h 49m

$310

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Wed 11/5

4:10 pm-10:51 pm

1 stop9h 41m

Ontario

Sat 11/8

7:00 am-5:30 pm

1 stop7h 30m

$313

Washington, D.C.Ontario

IAD - ONT

IADONT

Washington, D.C. Dulles Intl

Tue 10/21

7:40 am-4:40 pm

2 stops12h 00m

Ontario

Thu 10/23

2:15 pm-11:30 pm

1 stop6h 15m

$323

Flights are sorted by cheapest round-trip flights 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 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 June instead. Flights to Ontario in June, while not as cheap as those in September, still average around $328.

What is the cheapest day to depart on your flight to Ontario?

The cheapest day to depart on your flight to Ontario is on a Tuesday when prices can be found for as low as $323. This is often the case because there is less demand to fly during this day of the week. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Washington, D.C. Dulles Intl Airport to Ontario for around $480.

What is the cheapest time of day to depart on your flight to Ontario?

In the afternoon is the cheapest time of day to fly from Washington, D.C. Dulles Intl Airport to Ontario when you can find flight prices for as low as $366. Flying to Ontario in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $431 on average. Flights to Ontario from Washington, D.C. Dulles Intl Airport in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

As of September 2025, prices for Washington, D.C. Dulles Intl Airport to Ontario flights are approximately 20% 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

Direct flights

None
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.
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  • 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 56m.

  • 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 $173Free CancellationRating
5.8
3,173 reviews
Search Frontier flights
DeltaPriceFrom $213Free CancellationRating
7.9
7,961 reviews
Search Delta flights
United AirlinesPriceFrom $284Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
SouthwestPriceFrom $296Free CancellationRating
8.0
4,242 reviews
Search Southwest flights
American AirlinesPriceFrom $298Free CancellationRating
7.2
10,000 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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