Cheap United flights Washington (IAD) to San Salvador (SAL)

Make use of the “Price (lowest to highest)” filter on Expedia to look for cheap United Airlines return flights from IAD to SAL. Affordable one-way options are also available.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Browse for return or one-way flights to San Salvador in September or October. You could find lower fares with United Airlines during these off-season months.

Snagging the best United Airlines deals from IAD to SAL often comes down to timing. You can save 17% on international flights when you book 18 to 29 days before takeoff instead of four to five months ahead. As an added bonus, you can pocket 17% on average by buying your fare on a Sunday compared to a Friday, which is usually the most expensive day to book.* It’s a good idea to start checking out flights about one month before your travel dates.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Enter your dates, click search and tick the “Nonstop” filter on Expedia to find any direct flights from IAD to SAL with United Airlines or other airlines.

Browse United Airlines’s earliest flights from IAD to SAL by using the “Morning” and “Early Morning” filters. Not only will you arrive at your destination sooner, early departures also have a 20% less chance of being canceled.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

United Airlines flights from Washington Dulles Intl. Airport (IAD) to San Salvador land at El Salvador Intl. Airport (SAL). This is the main entry point here.

A rewarding loyalty program and the chance to rack up points through United Mileage Plus are the start of the reasons to fly from IAD to SAL with United Airlines. Plus, when you join Expedia’s free One Key™ program, you can receive OneKeyCash™* on top of United Airlines’s loyalty program earnings. It’s yours to spend on your next adventure.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on the type of ticket you purchased, a fee is typically charged if you cancel or reschedule your flight more than 24 hours after it has been confirmed. To secure flexible plane tickets, select our “No cancel fee” or “Changes included” filter when you search for flights. To learn more about changing or canceling your reservation, visit “Trips,” select your flight and click on “Manage Booking.”