IAD - ONT

$162 Find Cheap Flights from Washington Dulles Airport to Ontario - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$230
Typical prices: $324-$544
Frontier
Mon 9/17Sat 9/22
IAD - ONT • 1 stop
Cheapest one-way
$174
Typical prices: $164-$337
Frontier
Mon 9/24
IAD - ONT • 2 stops
Nonstop flights
Not available
There are currently no direct flights between Washington, D.C. Dulles Intl Airport and Ontario. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
November
Cheapest • 17% price drop
July
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Salt Lake City (SLC)
Cheapest • Avg $273 (round-trip)
Phoenix Sky Harbor Intl (PHX)
Shortest trip • 6h 52m (one-way)
Insights
Insights
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We hope you love your trip to Ontario!
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Flight Deals

Cheap Flights from Dulles Intl to Ontario (IAD-ONT)

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

Recent round-trip flight deals from Dulles Intl to Ontario

Thu, Sep 17 - Tue, Sep 22
Frontier Logo
12:30 pm - 6:39 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
9h 09m1 stop Dallas/Fort Worth
Frontier Logo
5:44 pm - 6:20 amONT  Ontario-IAD Washington, D.C. Dulles Intl
9h 36m1 stop Las Vegas Harry Reid Intl
$230Frontier
Thu, Oct 15 - Thu, Oct 22
Frontier Logo
12:30 pm - 7:05 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
9h 35m1 stop Dallas/Fort Worth
Frontier Logo
8:35 pm - 6:20 amONT  Ontario-IAD Washington, D.C. Dulles Intl
6h 45m1 stop Las Vegas Harry Reid Intl
$230Frontier
Tue, Sep 22 - Tue, Sep 22
Multiple Airlines Logo
7:00 am - 2:16 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
10h 16m1 stop Seattle/Tacoma Intl
Multiple Airlines Logo
5:44 pm - 6:20 amONT  Ontario-IAD Washington, D.C. Dulles Intl
9h 36m1 stop Las Vegas Harry Reid Intl
$292Multiple Airlines
Thu, Sep 10 - Wed, Sep 16
Multiple Airlines Logo
12:42 pm - 6:39 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
8h 57m1 stop Dallas/Fort Worth
Multiple Airlines Logo
12:12 pm - 11:59 pmONT  Ontario-IAD Washington, D.C. Dulles Intl
8h 47m1 stop Seattle/Tacoma Intl
$292Multiple Airlines
Wed, Nov 25 - Wed, Dec 2
United Airlines Logo
4:20 pm - 10:48 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
9h 28m1 stop San Francisco
United Airlines Logo
1:00 pm - 11:13 pmONT  Ontario-IAD Washington, D.C. Dulles Intl
7h 13m1 stop Denver Intl
$351United Airlines
Sat, Sep 12 - Wed, Sep 16
United Airlines Logo
5:15 pm - 10:59 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
8h 44m1 stop Chicago O'Hare Intl
United Airlines Logo
6:08 am - 4:22 pmONT  Ontario-IAD Washington, D.C. Dulles Intl
7h 14m1 stop San Francisco
$351United Airlines
Tue, Jan 5 - Sat, Jan 16
American Airlines Logo
12:14 pm - 6:50 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
9h 36m1 stop Dallas/Fort Worth
American Airlines Logo
12:43 pm - 11:23 pmONT  Ontario-IAD Washington, D.C. Dulles Intl
7h 40m1 stop Dallas/Fort Worth
$351American Airlines
Tue, Sep 15 - Tue, Sep 22
American Airlines Logo
6:52 am - 1:25 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
9h 33m1 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
Thu, Oct 29 - Sat, Oct 31
Delta Logo
6:13 am - 12:36 pmIAD  Washington, D.C. Dulles Intl-ONT Ontario
9h 23m1 stop Salt Lake City
Delta Logo
12:16 pm - 12:42 amONT  Ontario-IAD Washington, D.C. Dulles Intl
9h 26m1 stop Atlanta Hartsfield-Jackson
$351Delta
Mon, Jan 4 - Tue, Jan 19
Delta Logo
7:00 am - 11:27 amIAD  Washington, D.C. Dulles Intl-ONT Ontario
7h 27m1 stop Atlanta Hartsfield-Jackson
Delta Logo
12:00 pm - 12:20 amONT  Ontario-IAD Washington, D.C. Dulles Intl
9h 20m1 stop Atlanta Hartsfield-Jackson
$351Delta
Booking Insights

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

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

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

Round-trip flights from Washington, D.C. Dulles Intl Airport to Ontario start at $230. Prices are below average for this route right now, with typical round-trip fares ranging from $324 to $544. The lowest price found in the past 5 days was $230 on Frontier.

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

Tuesday is the cheapest day of the week to fly from Washington, D.C. Dulles Intl Airport to Ontario, it is 9% cheaper than the average day. Sunday is the most expensive day with flight prices 10% 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. Dulles Intl Airport to Ontario?

  • November is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Ontario at $337 round-trip.
  • March ($653) and December ($543) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 93% 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. Dulles Intl Airport to Ontario flights

Low season

February

Cheapest flight

$174
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly and prices are also 11% lower on average.
Flight from Washington, D.C. Dulles Intl Airport to Ontario

When to book flights from Dulles Intl to Ontario

Are your dates flexible? Find out the best times to travel from Dulles Intl 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. Dulles Intl Airport 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. Dulles Intl Airport to Ontario?

    Flights from Washington, D.C. Dulles Intl Airport to Ontario usually depart from Washington, D.C. Dulles Intl (IAD) and arrive at Ontario (ONT).

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

    Only Economy Class is available on flights from Washington, D.C. Dulles Intl Airport to Ontario.

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

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

    • Denver Intl (DEN) - 27% of one-stop connections
    • Atlanta Hartsfield-Jackson (ATL) - 20% of one-stop connections
    • Las Vegas Harry Reid Intl (LAS) - 20% of one-stop connections
    • Dallas/Fort Worth (DFW) - 18% 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. Dulles Intl Airport to Ontario?

    Yes. Being flexible with your travel dates can save you up to 17% on the Washington, D.C. Dulles Intl Airport to Ontario route. Tuesday is the cheapest departure day at $372 round-trip on average, while Sunday is the most expensive at $448, a difference of $76. 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. Dulles Intl Airport to Ontario?

    A nonstop flight from Washington, D.C. Dulles Intl Airport to Ontario takes 0h 00m, covering 2,236 miles.

  • What are the earliest and latest flights from Washington, D.C. Dulles Intl Airport to Ontario?

    These are the earliest and latest flight times available from Washington, D.C. Dulles Intl Airport to Ontario:

    • Earliest: departs at 12:00 am and lands at 12:00 am
    • Latest: departs at 12:00 am and lands at 12:00 am.

    The flight takes about 0h 00m.

  • Do I need a passport to fly from Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport to Ontario looking right now?

    One-way fares from Washington, D.C. Dulles Intl Airport to Ontario are currently lower than usual. Average one-way flight prices are about $176, which is 24% below the typical average for this route.

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

    Flying via Phoenix Sky Harbor Intl (PHX) gives the shortest average 1-stop total travel time at 6h 52m, compared with 7h 19m via Denver Intl (DEN) and 7h 24m via Charlotte Douglas (CLT).

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

    Ontario is 3 hours behind Washington, D.C. Dulles Intl Airport (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. Dulles Intl Airport to Ontario flight?

    Round-trip flights from Washington, D.C. Dulles Intl Airport to Ontario range from $324 to $544, with an average of $405 over the past 12 months. Anything below $324 counts as a good deal.

Your guide to booking Washington, D.C. Dulles Intl Airport 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 $372 - about $76 less than Sunday (17% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Washington, D.C. Dulles Intl Airport to Ontario trip for November. Fares historically average $337 round-trip in that month - typically $316 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 Dulles Intl to Ontario

Information on your arrival and departure airports

Washington Dulles Airport (IAD)
Ontario (ONT)