Cheap Flights from Ontario to Washington

Cheapest flights from Ontario to Washington

Flaut.Travel was designed and developed by a team dedicated to making the process of searching, comparing and booking airline tickets as easy and convenient as possible. Our service helps travelers to find and buy the cheapest flights from Ontario to Washington. We have connected more than 40 airlines and airline ticketing agencies to help you find the most suitable and affordable flight option.

Cheapest one way flight

$79

Frontier Airlines

1 layover

7h 29m

01/26/2026

The cheapest one-way flight from Ontario to Washington departs on 01/26/2026, is operated by Frontier Airlines and costs $79

Cheapest round trip flight

$137

Frontier Airlines

1 layover

21h 59m

01/23/2026

The cheapest roundtrip flight from Ontario to Washington departs on 01/23/2026, is operated by Frontier Airlines and costs $137

The fastest flight

7h 29m

Fastest flight from Ontario to Washington takes 7h 29m

Direct flights

Several times a week

There are direct flights on this route 3 days a week: Mo, Th, and Fr

Distance

3639km

Timezone difference

3h

The distance between Ontario and Washington is 3639km (2256 miles). The time difference between Ontario and Washington is 3h

Remember that on average the ideal time to book flights is 2 months before departure!

Airfare from Ontario to Washington by month

We carefully collect statistics on the search and pricing of airlines and, based on these data, we make an assumption about future prices. Thus, you can better understand which season is the cheapest to fly from Ontario to Washington

January 2026

Lowest price

on average:

$126

Avg Price

Airlines operating on route

The Ontario — Washington route is served by multiple airlines, including United Airlines and Frontier Airlines. This is convenient for those who want the best balance of price, schedule, and travel conditions. Tickets start from $79, and depending on season and promotions, even better deals may appear. With our service, you can easily compare available options and book tickets that match your plans. The variety of carriers allows flexible choices and comfortable travel without overpaying.

United Airlines

starting at $252

Frontier Airlines

starting at $79

Non-stop flights from Ontario to Washington

A non-stop flight is the most convenient and comfortable way to fly from Ontario to Washington, despite the fact that sometimes flights with transfers can cost significantly less.

Los Angeles — Washington

LAX — WAS

01/16/2026

Departure

Direct flight

UA1635

starting at $265

Los Angeles — Washington

LAX — WAS

01/26/2026

Departure

Direct flight

UA2311

starting at $252

Los Angeles — Washington

LAX — WAS

02/19/2026

Departure

Direct flight

UA2667

starting at $265

Schedule of direct flights from Ontario to Washington

A direct flight is the easiest way to get to your destination. The following airlines operate non-stop flights from Ontario to Washington:

Unable to find information about the schedule of direct flights from

Ontario airports overview

Ontario International Airport

•

ONT

5km

Serves Ontario and the Inland Empire region of Southern California, offering domestic and select international flights; convenient for travelers to Los Angeles, San Bernardino and nearby business centers.

•

Washington airports overview

Ronald Reagan National Airport

•

DCA

5km

Convenient for downtown Washington, D.C. and the National Mall, offering primarily domestic and short-haul flights with direct Metro access and quick transfers across the Potomac.

Washington Dulles International Airport

•

IAD

37km

•

Frequently asked questions (FAQ)

Answers to questions about the route that travelers are most interested in.

What is the cheapest price for flights from Ontario to Washington?

The cheapest flight ticket from Ontario to Washington according to data for the last 48 hours costs $79

When is the best time to buy air tickets on the route Ontario — Washington?

Often the best time to buy tickets from Ontario to Washington is 2 months before departure.

When is the cheapest time of year to fly from Ontario to Washington?

Based on statistics over the past years, the lowest prices for flights from Ontario to Washington can be found flying in these months: January.

How long does it take to fly from Ontario to Washington?

The fastest flights from Ontario to Washington start from 7 hours 29 minutes in the air.

Which airline can fly direct from Ontario to Washington?

The following airlines operate direct flights on the route Ontario — Washington: United Airlines

Special offers and sales on air tickets from Ontario to Washington

We keep tight track on airlines' pre-holidays sales and other special offers occurences all the time to let you save maximum amount of funds while traveling to your family or just going out on vacation.

We couldn't find any special offers for flights from Ontario to Washington

Alternative routes

Bakersfield ➜ Washington•Fresno ➜ Washington•Long Beach ➜ Washington•Merced ➜ Washington•Modesto ➜ Washington•Mexicali ➜ Washington•Santa Barbara ➜ Washington•Santa Maria ➜ Washington•Tijuana ➜ Washington•Yuma ➜ Washington•Ontario ➜ Baltimore•Ontario ➜ Charlottesville•Ontario ➜ Hagerstown•Ontario ➜ Lancaster•Ontario ➜ Philadelphia•Ontario ➜ Richmond

•••••••••••••••••••

Cheapest one way flight

$79

Frontier Airlines

1 layover

7h 29m

01/26/2026

The cheapest one-way flight from Ontario to Washington departs on 01/26/2026, is operated by Frontier Airlines and costs $79

Cheapest round trip flight

$137

Frontier Airlines

1 layover

21h 59m

01/23/2026

The cheapest roundtrip flight from Ontario to Washington departs on 01/23/2026, is operated by Frontier Airlines and costs $137

The fastest flight