WAS - ONT

$124 Find Cheap Flights from Washington, D.C. to Ontario - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$200
Typical prices: $288-$522
Frontier
Mon 9/17Wed 9/19
DCA - ONT • 1 stop
Cheapest one-way
$124
Typical prices: $162-$325
Frontier
Mon 9/24
BWI - ONT • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Washington, D.C. and Ontario. You'll need to take a connecting flight to reach the destination.
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Top routes
DCA - ONT
Cheapest • 5% average savings
IAD - ONT
Most popular
Insights
Insights
When to travel
January
Cheapest • 39% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Houston Hobby (HOU)
Cheapest • Avg $236 (round-trip)
Detroit Metropolitan Wayne County (DTW)
Shortest trip • 7h 30m (one-way)
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Flight Deals

Cheap Flights from Washington, D.C. to Ontario (WAS-ONT)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Washington, D.C. to Ontario

Mon, Oct 19 - Mon, Oct 19
Frontier Logo
6:00 am - 11:16 amIAD  Washington, D.C. Dulles Intl-ONT Ontario
8h 16m1 stop Las Vegas Harry Reid Intl
Frontier Logo
8:35 pm - 6:20 amONT  Ontario-IAD Washington, D.C. Dulles Intl
6h 45m1 stop Las Vegas Harry Reid Intl
$252Frontier
Sat, Sep 19 - Tue, Sep 22
Frontier Logo
6:00 am - 4:34 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
13h 34m1 stop Las Vegas Harry Reid Intl
Frontier Logo
5:44 pm - 6:20 amONT  Ontario-IAD Washington, D.C. Dulles Intl
9h 36m1 stop Las Vegas Harry Reid Intl
$252Frontier
Sat, Sep 19 - Mon, Sep 28
Multiple Airlines Logo
6:00 pm - 11:47 pmDCA  Washington, D.C. Reagan-National-ONT Ontario
8h 47m1 stop Denver Intl
Multiple Airlines Logo
10:47 am - 4:00 pmONT  Ontario-DCA Washington, D.C. Reagan-National
26h 13m1 stop Portland
$307Multiple Airlines
Wed, Oct 21 - Sat, Oct 24
Multiple Airlines Logo
7:02 am - 1:16 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
9h 14m1 stop Seattle/Tacoma Intl
Multiple Airlines Logo
5:25 pm - 6:20 amONT  Ontario-IAD Washington, D.C. Dulles Intl
9h 55m1 stop Las Vegas Harry Reid Intl
$312Multiple Airlines
Fri, Sep 11 - Sat, Sep 12
Delta Logo
2:03 pm - 8:05 pmBWI  Baltimore/Washington-ONT Ontario
9h 02m1 stop Atlanta Hartsfield-Jackson
Delta Logo
5:15 pm - 6:18 amONT  Ontario-BWI Baltimore/Washington
10h 03m1 stop Salt Lake City
$347Delta
Fri, Sep 11 - Fri, Sep 11
Delta Logo
7:35 am - 12:14 pmBWI  Baltimore/Washington-ONT Ontario
7h 39m1 stop Salt Lake City
Delta Logo
5:15 pm - 6:18 amONT  Ontario-BWI Baltimore/Washington
10h 03m1 stop Salt Lake City
$347Delta
Wed, Nov 18 - Wed, Nov 25
American Airlines Logo
7:14 am - 11:52 amIAD  Washington, D.C. Dulles Intl-ONT Ontario
7h 38m1 stop Dallas/Fort Worth
American Airlines Logo
7:00 am - 6:07 pmONT  Ontario-IAD Washington, D.C. Dulles Intl
8h 07m1 stop Dallas/Fort Worth
$351American Airlines
Tue, Sep 22 - Tue, Sep 29
American Airlines Logo
6:52 am - 11:47 amIAD  Washington, D.C. Dulles Intl-ONT Ontario
7h 55m1 stop Dallas/Fort Worth
American Airlines Logo
8:25 am - 8:24 pmONT  Ontario-IAD Washington, D.C. Dulles Intl
8h 59m1 stop Dallas/Fort Worth
$351American Airlines
Sat, Nov 7 - Tue, Nov 10
United Airlines Logo
1:17 pm - 6:47 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
8h 30m1 stop Chicago O'Hare Intl
United Airlines Logo
1:29 pm - 11:15 pmONT  Ontario-IAD Washington, D.C. Dulles Intl
6h 46m1 stop Denver Intl
$351United Airlines
Sat, Sep 26 - Sat, Oct 3
United Airlines Logo
5:48 pm - 10:59 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
8h 11m1 stop San Francisco
United Airlines Logo
1:22 pm - 11:25 pmONT  Ontario-IAD Washington, D.C. Dulles Intl
7h 03m1 stop Denver Intl
$351United Airlines
Booking Insights

Price, demand and travel trends for Washington, D.C. to Ontario flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Washington, D.C. to Ontario with more confidence.

How much is a round-trip flight from Washington, D.C. to Ontario?

Round-trip flights from Washington, D.C. to Ontario start at $200. Prices are below average for this route right now, with typical round-trip fares ranging from $288 to $522. The lowest price found in the past 5 days was $200 on Frontier.

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

There's little price difference between Washington, D.C. to Ontario routes. They average around $385 round-trip, based on KAYAK data over the past 12 months.

What's the cheapest day of the week to fly from Washington, D.C. to Ontario?

Tuesday is the cheapest day of the week to fly from Washington, D.C. to Ontario, it is 9% cheaper than the average day. Sunday is the most expensive day with flight prices 16% higher than average. Based on deals found by KAYAK users in the last 12 months.

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

  • January is the cheapest month to fly from Washington, D.C. to Ontario at $237 round-trip.
  • March ($501) and December ($487) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 111% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

Find deals

Key details for Washington, D.C. to Ontario flights

Low season

April

Cheapest flight

$124
Best time to beat the crowds but there is an average 18% increase in price.
Most popular time to fly with an average 5% increase in price.
Flight from Baltimore to Ontario

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

Are your dates flexible? Find out the best times to travel from Washington, D.C. to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Washington, D.C. to Ontario flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Which airports can I use when flying from Washington, D.C. to Ontario?

    Flights from Washington, D.C. to Ontario may depart from several airports in Washington, D.C. area, including Washington, D.C. Reagan-National (DCA) and Washington, D.C. Dulles Intl (IAD). Flights usually arrive at Ontario (ONT).

  • What cabin classes can I book on flights from Washington, D.C. to Ontario?

    Four cabin classes are available on flights from Washington, D.C. to Ontario:

    • Economy Class
    • Premium Economy Class
    • Business Class
    • First Class

    Prices vary by airline.

  • Which airports do connecting flights from Washington, D.C. to Ontario pass through?

    One-stop flights from Washington, D.C. to Ontario most commonly connect through:

    • Denver Intl (DEN) - 36% of one-stop connections
    • Dallas/Fort Worth (DFW) - 21% of one-stop connections
    • Atlanta Hartsfield-Jackson (ATL) - 16% of one-stop connections
    • Las Vegas Harry Reid Intl (LAS) - 7% of one-stop connections

    Denver Intl (DEN) handles the largest share of one-stop connections on this route.

  • Can I save money by using flexible dates for flights from Washington, D.C. to Ontario?

    Yes. Being flexible with your travel dates can save you up to 22% on the Washington, D.C. to Ontario route. Tuesday is the cheapest departure day at $352 round-trip on average, while Sunday is the most expensive at $448, a difference of $96. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What popular places can I visit in Ontario?

    Some of the most popular sights in Ontario are Ontario Convention Center, Ontario Mills and Cucamonga-Guasti Regional Park. These are among the most viewed places in Ontario on KAYAK.

  • How long is a flight from Washington, D.C. to Ontario?

    A nonstop flight from Washington, D.C. to Ontario takes 0h 00m, covering 2,258 miles.

  • Do I need a passport to fly from Washington, D.C. to Ontario?

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

  • How are flight prices from Washington, D.C. to Ontario looking right now?

    One-way fares from Washington, D.C. to Ontario are currently lower than usual. Average one-way flight prices are about $165, which is 25% below the typical average for this route.

  • How much time can I save by choosing a different layover airport from Washington, D.C. to Ontario?

    Flying via Houston Hobby (HOU) gives the shortest average 1-stop total travel time at 7h 07m, compared with 7h 30m via Detroit Metropolitan Wayne County (DTW) and 7h 38m via Phoenix Sky Harbor Intl (PHX).

  • What is the time difference between Washington, D.C. and Ontario?

    Ontario is 3 hours behind Washington, D.C. (Pacific Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

  • What car rental options are available at Ontario Airport (ONT)?

    Ontario Airport (ONT) hosts 5 major car rental companies, with daily rates starting from around $18 for economy cars. Top options include:
    · Fox
    · Thrifty
    · Europcar
    · Dollar
    · Alamo

  • How much should I expect to pay for a Washington, D.C. to Ontario flight?

    Round-trip flights from Washington, D.C. to Ontario range from $288 to $522, with an average of $386 over the past 12 months. Anything below $288 counts as a good deal.

Your guide to booking Washington, D.C. to Ontario flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Tuesday departure instead of Sunday. On this route, Tuesday flights average $352 - about $96 less than Sunday (21% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Washington, D.C. to Ontario trip for January. Fares historically average $237 round-trip in that month - typically $264 less than the most expensive month, which is March (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Ontario Airport.
    - Azure Hotel & Suites, Trademark Collection by Wyndham
    - La Quinta Inn & Suites by Wyndham Ontario Airport
    - Holiday Inn Ontario Airport By IHG

Everything you need to know for your flight from Washington, D.C. to Ontario

Information on your arrival and departure airports

Ontario (ONT)