Cheap flights from Washington, D.C. to Costa Rica from $139

The cheapest month to fly to Costa Rica from Washington, D.C. is in August. Flight prices, which tend to average around $109, are often lower during this time because this is during the off-season. If you’re not able to fly to Costa Rica in August, then October is your next best option. Flight prices from Washington, D.C. to Costa Rica during October average around $126.

According to our data, Tuesday is the cheapest day to fly to Costa Rica from Washington, D.C.. The lowest ticket price found for a Tuesday departure recently was $351. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $616. These prices are subject to change though, so be sure to set up a Price Alert for flights to Costa Rica.

In the evening is the cheapest time of day to fly from Washington, D.C. to Costa Rica when you can find flight prices for as low as $381. Flying to Costa Rica in the evening is an ideal time because this is during off-peak travel hours. Flights to Costa Rica are more costly in the morning, with an average ticket price of $744. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Washington, D.C. Dulles Intl to San José Juan Santamaria Intl for the best Washington, D.C. - Costa Rica flight prices

You are more likely to see cheaper flights to Costa Rica from Washington, D.C. when booking weeks ahead of your departure date. In general, you can expect to find flights to Costa Rica for around $358 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Costa Rica from Washington, D.C. for as low as $333 on momondo.

United Airlines, Delta, and American Airlines are the most popular carriers operating from Washington, D.C. to Costa Rica

Avianca, American Airlines and United Airlines are the top three most popular airlines that fly to Costa Rica from Washington, D.C. according to our data. Avianca is the first choice among our users, with 33% of people opting to fly with this airline when traveling to Costa Rica. Keep in mind that there are 9 different airlines that fly to Costa Rica on a routine basis, so you have a few additional options to choose from.

As of May 2026, 5 flights take off from Washington, D.C. and land in Costa Rica each week. The most common flight departure day for this route is Sat, with 40% of weekly flights taking off on this day.

Flight times vary depending on what airport in Washington, D.C. you fly out of and what airport in Costa Rica you fly into. For example, flying from Baltimore to San José takes 4h 40m on average. On the other hand, flying from Washington, D.C. to San José takes 6h 09m on average. Keep in mind that it’s always quicker to opt for a non-stop flight, so be sure to check momondo if there are any available for your route.