£149 Cheap Flights from Washington (IAD) to Ontario Intl. Airport (ONT)

You can find one-way and return flights from IAD to ONT with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when IAD to ONT ticket fares go up or down.

If you're looking for the cheapest time to fly from Washington Dulles Intl. (IAD) to Ontario Intl. Airport (ONT), October is typically your best bet! You can expect average return fares around £275 during this month. October often sees lower prices as the peak summer travel season has ended, and the holiday rush hasn't quite begun, leading to less demand. Other budget-friendly months for this route include April and September.

Enter IAD to ONT and your travel dates, then apply the 'Nonstop' filter to see only direct flights.

To find a cheap flight from Washington, DC (IAD) to Ontario Intl. Airport (ONT), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.

The best time to fly from Washington, DC (IAD-Washington Dulles Intl.) to Ontario Intl. Airport (ONT) is typically October or September. These months offer a great balance, with prices around £275 for a return flight.

The earliest flight from Washington, DC (IAD-Washington Dulles Intl.) to Ontario Intl. Airport (ONT) typically departs around 5:00 AM. This service is operated by American Airlines and is a seasonal service active in August. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.

There are no nonstop flights from Washington, DC (IAD-Washington Dulles Intl.) to Ontario Intl. Airport (ONT). The distance between these two airports is approximately 3,600 kilometres. Flights with one stop typically take around 7 hours 30 minutes. If you have two or more stops, your journey will be longer, usually around 11 hours. Keep in mind that actual flight times can vary due to factors like routing, weather, and wind patterns.

Select the "Business class" and "First class" filters when looking for Washington, DC (IAD) to Ontario Intl. Airport (ONT) flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.

It's easy to earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to Ontario Intl. Airport (ONT) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.

*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.

If you're planning to travel to Ontario from Washington Dulles Intl. (IAD), you can fly directly into Los Angeles - Ontario Intl. (ONT). Some flights may connect through major hubs like Seattle - Tacoma Intl. (SEA), San Diego Intl. (SAN), or Charlotte-Douglas Intl. (CLT) before reaching Ontario. Compare routes and airports on Expedia to find the best flight options for your travel plans.

Typically, booking a last minute flight from Washington, DC (IAD-Washington Dulles Intl.) to Ontario Intl. Airport (ONT) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.

Securing a Washington, DC (IAD-Washington Dulles Intl.) to Ontario Intl. Airport (ONT) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.

If you booked your Washington, DC (IAD) to Ontario Intl. Airport (ONT) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.