CA $228 Cheap Flights from Ontario (ONT) to Washington (DCA)

View CA $228 flight on Thu, May 8, 2025Opens in a new window

Featured airlines

Air Canada
Air Transat
WestJet
American Airlines
Flair Airlines
Philippine Airlines
Air India
Lufthansa
Caribbean Airlines

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 30% on select hotels after you book a flight*
  • payments icon
    Earn twice
    Earn your airline miles on top of our rewards
    Sign in

Cheap flights from Ontario (ONT) to Washington (DCA)

Prices were available within the past 7 days and start at CA $228 for one-way flights and CA $1,037 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Wed., May 7 - Sat., May 10
ONT
Ontario
DCA
Washington
CA $1,037 Roundtrip, found 4 hours ago
CA $1,037
Roundtrip
found 4 hours ago
Select Alaska Airlines flight, departing Wed., May 7 from Ontario to Washington, returning Sat., May 10, priced at CA $1,037 found 4 hours ago

Frequently asked questions

How much is a flight from ONT to National Airport?
Round-trip tickets from Ontario Airport to DCA start from CA $1,037. This figure is based on fares offered within the last 7 days on Expedia for flights departing within the next year — book today to avoid missing out. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from ONT to National Airport?
We get that things come up unexpectedly, so we’ve made it as simple as possible for you to cancel your trip online. Just visit the Customer Service Portal and follow the instructions.
How do I find cheap flights from Ontario Airport to DCA that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you’re searching for Los Angeles - Ontario Intl. Airport (ONT) to National Airport flights, you’ll see a “no change fees” filter for you to select.
How far is the flight from Los Angeles - Ontario Intl. Airport (ONT) to DCA?
It’s around 3,600 kilometers between Ontario and Arlington, so you’ll be in your seat for a while. Keep yourself occupied with things like a magazine or a good old-fashioned book.
Which airlines fly direct from Ontario Airport to DCA?
If you want to travel straight from Ontario Airport to National Airport, you’ll need to book a flight with at least one stop. Unfortunately, there aren’t any airlines that fly directly between these airports.
Are Los Angeles - Ontario Intl. Airport (ONT) to National Airport flight tickets cheaper when they're purchased at the last minute?
Booking your trip from Ontario Airport to National Airport last minute could be your ticket to an awesome deal. However, it could end up costing a good deal more! If you’d prefer not to take any chances, book well ahead of your departure date. In fact, Expedia has some of the best bargains up to a year in advance. If your preferred carrier hasn’t released tickets yet, check back regularly as deals are updated all the time on Expedia.
*Available to Expedia members.