Cheap Flights from Ontario to Washington (ONT to DCA) from $228.00

Planning a trip from Southern California's Inland Empire to the nation's capital? Globitude Travels makes booking flights from Ontario (ONT) to Washington (DCA) seamless and affordable. Whether you are traveling for business on Capitol Hill or exploring historic landmarks and Smithsonian museums, our flight specialists help you secure great fares and convenient connections from start to finish.

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Cheapest fares from Ontario to Washington

Lowest fare found per airline on the ONT → DCA route, with our discounted phone-deal price.

Airline	Cabin	Found fare	Our discounted fare	Fare found on
Delta Air Lines	Economy	~~$381.20~~	$228.72	Sep 12, 2026	Book
Southwest	Economy	~~$382.00~~	$229.20	Sep 12, 2026	Book
Frontier	Economy	~~$452.59~~	$271.55	Sep 12, 2026	Book
Alaska Airlines	Economy	~~$578.00~~	$346.80	Sep 12, 2026	Book
United Airlines	Economy	~~$582.20~~	$349.32	Sep 12, 2026	Book
JetBlue	Economy	~~$625.80~~	$375.48	Sep 12, 2026	Book
American Airlines	Economy	~~$658.20~~	$394.92	Sep 12, 2026	Book

Discounted fares are negotiated phone deals from our vendor network and may not appear in online search results — call 1-856-513-6369 to lock one in. Fares were found on the dates shown, are per person in USD, and change with availability.

Flying from Ontario to Washington, D.C.

Departing from Ontario International Airport (ONT) offers a relaxed, stress-free departure experience compared to busier regional hubs. Arriving at Ronald Reagan Washington National Airport (DCA) places you just across the Potomac River from downtown Washington, D.C., offering unmatched proximity to the city center and seamless access to the Metrorail system.

Washington experiences four distinct seasons, featuring picturesque cherry blossoms in spring, warm summers, and crisp autumn foliage. From the historic charm and upscale dining of Georgetown to the political landmarks along the National Mall, visitors can explore world-renowned free museums, diverse international cuisine, and vibrant neighborhoods during their stay.

Money-saving tips for this route

Reserve your flight at least four to six weeks in advance to secure the best rates and seat options.
Choose Tuesday or Wednesday departures to take advantage of lower mid-week airfare trends.
Use the Metrorail from DCA to avoid heavy highway traffic and costly parking in central Washington.
Pack versatile clothing layers to stay comfortable across changing seasonal temperatures in the Mid-Atlantic.

Frequently asked questions

What airports serve the Ontario to Washington route?

Flights depart from Ontario International Airport (ONT) in Southern California and arrive at Ronald Reagan Washington National Airport (DCA) in Arlington, Virginia, just across the river from downtown Washington, D.C.

When is the cheapest month to book flights from ONT to DCA?

Budget-friendly airfares on this route are generally found during the winter months, specifically January and February, outside of major federal holidays.

Are there typically nonstop flights between ONT and DCA?

Most itineraries between Ontario and Reagan National Airport include one layover through major airline hubs across the central or western United States.

What is the easiest way to travel from DCA into downtown Washington?

Ronald Reagan Washington National Airport features its own Metrorail station connected directly to terminals, providing quick, inexpensive transit into the city on the Blue and Yellow lines.

Can I book my flight from Ontario to Washington over the phone with Globitude Travels?

Yes, Globitude Travels provides dedicated phone support so you can speak directly with a travel advisor to compare routes, arrange seating, and finalize your booking.

Related routes

↩ Washington to Ontario Ontario to Atlanta Ontario to Baton Rouge Ontario to Belize City Ontario to Bogota Ontario to Boston Ontario to Buffalo Chicago to Washington Dallas-Fort Worth to Washington Dallas to Washington Denver to Washington Fort Lauderdale to Washington Greensboro to Washington All routes →

Why book with Globitude Travels

💸 Transparent pricing
The fare you see is all-inclusive — taxes and fees shown before you pay, never after.

🤝 Real travel experts
Every booking is reviewed by our team, and phone-only vendor deals can beat any online price.

🎧 24/7 human support
Before, during and after your trip — changes, cancellations and special requests handled by people.

🔒 Secure checkout
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Globitude Travels is an independent travel agency — call 1-856-513-6369 or use the search above to compare live fares on this route. See our terms, privacy policy, refund policy and service fees for full details, or contact us any time.

Page updated August 25, 2026 · fare data refreshed automatically from live flight searches.