There are most likely no direct flights on the Washington — Ontario route
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 Washington to Ontario. We have connected more than 40 airlines and airline ticketing agencies to help you find the most suitable and affordable flight option.
A non-stop flight is the most convenient and comfortable way to fly from Washington to Ontario, despite the fact that sometimes flights with transfers can cost significantly less.
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There are most likely no direct flights on the Washington — Ontario route
We couldn't find any special offers for flights from Washington to Ontario
There appear to be no non-stop flights from Washington to Ontario at this time.... Well, or something went wrong on our side and we couldn't find anything
starting at $153
On the Washington — Ontario route, flights are operated only by Frontier Airlines. This simplifies the choice for passengers, as all tickets come from a single trusted carrier. Our service lets you instantly check fares for upcoming dates and find the most advantageous option. The minimum ticket price starts at $153, making this trip affordable for a wide range of travelers. To save even more, we recommend booking early and keeping an eye on promotions — Frontier Airlines regularly offers special deals.
Flight prices from Washington to Ontario are steadily rising: from October 2026 to August 2027, ticket costs increased by 152%. The sooner you book, the better the deal.
The most significant price increase was from October 2026 to July 2027 — up 262%. The best time to fly is October 2026–November 2026, when the average price is $97. In April 2027–July 2027, tickets cost around $305.
Given the rising prices, it's best not to delay your purchase. Flying in October 2026–November 2026 can save you up to 68% compared to the most expensive months.
Price variation across months on this route is 40.7%. Your choice of departure month significantly affects the total flight cost.
The cost of a one-way flight from Washington to Ontario ranges from $94 (October 2026) to $341 (July 2027). On average, the ticket price is about $201–$238.
The cheapest flight ticket from Washington to Ontario according to data for the last 48 hours costs $153
Often the best time to buy tickets from Washington to Ontario is 2 months before departure.
Based on statistics over the past years, the lowest prices for flights from Washington to Ontario can be found flying in these months: October, November, December.
The fastest flights from Washington to Ontario start from 8 hours 51 minutes in the air.
The following airlines operate direct flights on the route Washington — Ontario:
The cheapest one-way flight from Washington to Ontario departs on 11/07/2026, is operated by Frontier Airlines and costs $153
The cheapest roundtrip flight from Washington to Ontario departs on 12/14/2026, is operated by Frontier Airlines and costs $307
Fastest flight from Washington to Ontario takes 8h 51m
There are no direct flights on this route.
The distance between Washington and Ontario is 3639km (2256 miles). The time difference between Washington and Ontario is 3h