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ONT - WAS

$80 Find Cheap Flights from Ontario to Washington, D.C. - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$174
Typical prices: $286-$559
Frontier
Sat 10/27Fri 11/2
ONT - BWI • 2 stops
Cheapest one-way
$80
Typical prices: $165-$330
Frontier
Sun 11/4
ONT - IAD • 2 stops
Nonstop flights
Not available
There are currently no direct flights between Ontario and Washington, D.C.. You'll need to take a connecting flight to reach the destination.
Insights
Insights
Top routes
ONT - DCA
Cheapest • 5% average savings
ONT - IAD
Most popular
Insights
Insights
When to book
9 weeks
in advance
Our data shows that travelers who book at least 9 weeks in advance save around 40% compared to booking last minute.
Insights
Insights
When to travel
September
Cheapest • 33% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Las Vegas Harry Reid Intl (LAS)
Cheapest • Avg $361 (round-trip)
Nashville Intl (BNA)
Shortest trip • 7h 28m (one-way)
Insights
Insights
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Flight Deals

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

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

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

Tue, Oct 27 - Mon, Nov 2
Frontier Logo
5:07 pm - 9:50 amONT  Ontario-BWI Baltimore/Washington
13h 43m2 stops Las Vegas Harry Reid Intl Atlanta Hartsfield-Jackson
Frontier Logo
9:12 pm - 11:51 pmBWI  Baltimore/Washington-ONT Ontario
29h 39m2 stops Atlanta Hartsfield-Jackson Denver Intl
$174Frontier
Tue, Oct 20 - Wed, Oct 21
Frontier Logo
5:25 pm - 9:27 amONT  Ontario-BWI Baltimore/Washington
13h 02m2 stops Las Vegas Harry Reid Intl Atlanta Hartsfield-Jackson
Frontier Logo
12:37 pm - 11:50 pmBWI  Baltimore/Washington-ONT Ontario
14h 13m2 stops Dallas/Fort Worth Denver Intl
$197Frontier
Mon, Nov 2 - Tue, Nov 10
Multiple Airlines Logo
8:03 pm - 11:36 amONT  Ontario-IAD Washington, D.C. Dulles Intl
12h 33m1 stop Dallas/Fort Worth
Multiple Airlines Logo
7:46 am - 3:13 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
10h 27m1 stop Seattle/Tacoma Intl
$279Multiple Airlines
Mon, Oct 19 - Tue, Oct 27
Multiple Airlines Logo
8:35 pm - 6:20 amONT  Ontario-IAD Washington, D.C. Dulles Intl
6h 45m1 stop Las Vegas Harry Reid Intl
Multiple Airlines Logo
7:02 am - 1:16 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
9h 14m1 stop Seattle/Tacoma Intl
$302Multiple Airlines
Tue, Oct 20 - Wed, Oct 28
Delta Logo
1:35 pm - 11:35 pmONT  Ontario-IAD Washington, D.C. Dulles Intl
7h 00m1 stop Salt Lake City
Delta Logo
6:00 am - 11:06 amIAD  Washington, D.C. Dulles Intl-ONT Ontario
8h 06m1 stop Atlanta Hartsfield-Jackson
$351Delta
Mon, Dec 7 - Wed, Jan 6
Delta Logo
11:08 pm - 9:16 amONT  Ontario-IAD Washington, D.C. Dulles Intl
7h 08m1 stop Atlanta Hartsfield-Jackson
Delta Logo
6:40 am - 11:27 amIAD  Washington, D.C. Dulles Intl-ONT Ontario
7h 47m1 stop Atlanta Hartsfield-Jackson
$351Delta
Thu, Jan 28 - Tue, Feb 2
American Airlines Logo
6:00 am - 4:17 pmONT  Ontario-IAD Washington, D.C. Dulles Intl
7h 17m1 stop Dallas/Fort Worth
American Airlines Logo
12:30 pm - 6:51 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
9h 21m1 stop Dallas/Fort Worth
$351American Airlines
Thu, Jan 28 - Tue, Feb 2
American Airlines Logo
12:45 pm - 10:55 pmONT  Ontario-IAD Washington, D.C. Dulles Intl
7h 10m1 stop Dallas/Fort Worth
American Airlines Logo
7:00 am - 1:25 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
9h 25m1 stop Dallas/Fort Worth
$351American Airlines
Mon, Oct 26 - Mon, Nov 2
United Airlines Logo
1:35 pm - 12:59 amONT  Ontario-IAD Washington, D.C. Dulles Intl
8h 24m1 stop San Francisco
United Airlines Logo
6:15 am - 12:29 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
9h 14m1 stop San Francisco
$351United Airlines
Sat, Oct 24 - Mon, Nov 2
United Airlines Logo
11:10 am - 10:07 pmONT  Ontario-IAD Washington, D.C. Dulles Intl
7h 57m1 stop San Francisco
United Airlines Logo
4:15 pm - 10:48 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
9h 33m1 stop San Francisco
$351United Airlines
Booking Insights

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

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

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

Round-trip flights from Ontario to Washington, D.C. typically range from $286 to $559. The lowest price found in the past 5 days was $174, on Frontier.

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

There's little price difference between Ontario to Washington, D.C. routes. They average around $425 round-trip, based on KAYAK data over the past 12 months.

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

Based on deals KAYAK users found in the last 12 months, Thursday is the cheapest day of the week to fly from Ontario to Washington, D.C.. It’s 11% cheaper than the average day, while Monday is the most expensive, with prices 22% higher.

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

•September is the cheapest month to fly from Ontario to Washington, D.C. at $276 round-trip.
•June ($510) and July ($498) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 84% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Ontario to Washington, D.C. the cheapest?

Flights from Ontario to Washington, D.C. are cheapest 9 weeks before departure. Booking in this window typically costs about 40% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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

Low season

January

Cheapest flight

$80
Beat the crowds with an average 26% drop in travelers.
The most popular month to fly with an average 24% increase in travelers.
One-way flight from Ontario to Washington, D.C. Dulles Intl Airport

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

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

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

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

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

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

    • Economy Class
    • Business Class
    • First Class

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

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

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

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

    Round-trip flights from Ontario to Washington, D.C. range from $286 to $559, with an average of $414 over the past 12 months. Anything below $286 counts as a good deal.

  • How expensive are last-minute Ontario to Washington, D.C. flights?

    Last-minute fares on this route (booked within two weeks of departure) run 14% above the $414 route average. Book 9 weeks before departure for the lowest fares.

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

    One-way fares from Ontario to Washington, D.C. are currently lower than usual. Average one-way flight prices are about $157, which is 28% below the typical average for this route.

  • What car rental options are available in Washington, D.C.?

    Since Washington, D.C. is served by multiple airports, car rental options and rates can vary depending on which one you fly into.
    Near Washington, D.C. Reagan-National Airport (DCA) — daily rates from around $23:

    • Sixt
    • Dollar
    • Thrifty
    • Alamo
    • Budget

    Near Washington, D.C. Dulles Intl Airport (IAD) — daily rates from around $24:

    • Dollar
    • Budget
    • Hertz
    • Sixt
    • Thrifty

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

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

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

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

    • Denver Intl (DEN) - 59% of one-stop connections
    • Dallas/Fort Worth (DFW) - 12% of one-stop connections
    • Chicago O'Hare Intl (ORD) - 7% of one-stop connections
    • Atlanta Hartsfield-Jackson (ATL) - 5% of one-stop connections

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

    Yes. Flexible dates can save you up to 27% on flights from Ontario to Washington, D.C.. Thursday is the cheapest departure day at $372 round-trip on average, while Monday is the most expensive at $509, a difference of $137.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

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

    Flying via Nashville Intl (BNA) gives the shortest average 1-stop total travel time at 7h 28m, compared with 7h 39m via Chicago O'Hare Intl (ORD) and 7h 45m via Atlanta Hartsfield-Jackson (ATL).

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

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

  • What popular places can I visit in Washington, D.C.?

    Some of the most popular sights in Washington, D.C. are Walter E. Washington Convention Center, National Mall and Capital One Arena. These are among the most viewed places in Washington, D.C. on KAYAK.

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

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Thursday departure and avoid flying on Monday. On this route, Thursday flights average $372, about $137 less than Monday fares (27% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 9 weeks before you fly. On this route, that window historically saves about 40% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Ontario to Washington, D.C. trip for September. Fares historically average $276 round-trip in that month - typically $234 less than the most expensive month, which is June (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Washington, D.C. Reagan-National Airport.

    • Hyatt House Washington DC The Wharf
    • Intercontinental Hotels Washington D.C. - The Wharf By IHG
    • Pendry Washington DC - The Wharf

More options for your flight from Ontario to Washington, D.C.

Complete your trip to Washington, D.C. with a hotel stay or car rental

Car rentals in Washington, D.C.
Hotels in Washington, D.C.
Vacations in Washington, D.C.