Cheap flights from Washington, D.C. to Barcelona from $345

The cheapest month to fly to Barcelona-El Prat Airport from Washington, D.C. is in January. Flight prices, which tend to average around $553, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, then book flights to Barcelona-El Prat Airport from Washington, D.C. during November instead. Flights to Barcelona-El Prat Airport in November, while not as cheap as those in January, still average around $573.

The cheapest day to depart on your flight to Barcelona-El Prat Airport is on a Monday when prices can be found for as low as $742. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $1,130. These prices are subject to change though, so be sure to set up a Price Alert for flights to Barcelona-El Prat Airport.

Flying to Barcelona-El Prat Airport from Washington, D.C. in the evening is the least expensive time of day to depart. momondo users have found prices as low as $882 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $953 on average. Flights to Barcelona-El Prat Airport from Washington, D.C. in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

Fly from Washington, D.C. Dulles Intl to Barcelona-El Prat for the best Washington, D.C. - Barcelona-El Prat flight prices

You are more likely to see cheaper flights to Barcelona-El Prat Airport from Washington, D.C. when booking weeks ahead of your departure date. In general, you can expect to find flights to Barcelona-El Prat Airport for around $768 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Barcelona-El Prat Airport from Washington, D.C. for as low as $686 on momondo.

There are 3 cabin classes available to choose from on Washington, D.C. to Barcelona-El Prat flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 36% on your flight if you consider stops on a Washington, D.C. to Barcelona-El Prat Airport flight.

As of April 2026, prices for Washington, D.C. to Barcelona-El Prat Airport flights are approximately 395% more expensive when compared to flights at the same time last year.

Royal Air Maroc and Air Europa are the most popular carriers operating from Washington, D.C. to Barcelona-El Prat

United Airlines, TAP AIR PORTUGAL and British Airways are the top three most popular airlines that fly to Barcelona-El Prat Airport from Washington, D.C. according to our data. United Airlines is the first choice among our users, with 55% of people opting to fly with this airline when traveling to Barcelona-El Prat Airport. Keep in mind that there are 15 different airlines that fly to Barcelona-El Prat Airport on a routine basis, so you have a few additional options to choose from.

Lisbon (LIS) was the most common stop: 36% of momondo users choosing 1-stop flights on this route connected there.

Flights via Reykjavik (KEF) offer the lowest average round-trip price of $473.

Flights connecting via Boston (BOS) have the shortest average one-way travel time: 10h 34m.

Amsterdam (AMS) has the shortest average layover time for this route: 1h 18m.

3 flights are operational daily from Washington, D.C. to Barcelona-El Prat Airport as of April 2026. The most popular departure time for this route is 6:00PM, with 100% of flights per day taking off in the evening.

The number of flights available between Washington, D.C. and Barcelona-El Prat Airport is 21 per week as of April 2026. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.