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Cheap Flights from Washington D.C. (IAD) to Bilbao (BIO)

Compare Washington Dulles to Bilbao flight deals

Find the cheapest month or even day of the year to fly to Bilbao

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Flight deals from Washington Dulles to Bilbao

Looking for a cheap last-minute deal or the best return flight from Washington Dulles to Bilbao? Find the lowest prices on one-way and return tickets right here.
Bilbao.$721 per passenger.Departing Mon, 29 Sep, returning Tue, 14 Oct.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from Washington Dulles on Mon, 29 Sep, arriving in Bilbao.Inbound indirect flight with TAP Air Portugal, departs from Bilbao on Tue, 14 Oct, arriving in Washington Dulles.Price includes taxes and charges.From $721, select.
Bilbao.$723 per passenger.Departing Tue, 7 Oct, returning Tue, 14 Oct.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from Washington Dulles on Tue, 7 Oct, arriving in Bilbao.Inbound indirect flight with TAP Air Portugal, departs from Bilbao on Tue, 14 Oct, arriving in Washington Dulles.Price includes taxes and charges.From $723, select.
Bilbao.$723 per passenger.Departing Mon, 2 Mar, returning Mon, 9 Mar.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from Washington Dulles on Mon, 2 Mar, arriving in Bilbao.Inbound indirect flight with TAP Air Portugal, departs from Bilbao on Mon, 9 Mar, arriving in Washington Dulles.Price includes taxes and charges.From $723, select.
Bilbao.$723 per passenger.Departing Sun, 26 Oct, returning Sun, 2 Nov.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from Washington Dulles on Sun, 26 Oct, arriving in Bilbao.Inbound indirect flight with TAP Air Portugal, departs from Bilbao on Sun, 2 Nov, arriving in Washington Dulles.Price includes taxes and charges.From $723, select.
Bilbao.$749 per passenger.Departing Mon, 22 Sep, returning Tue, 30 Sep.Return flight with SWISS and Lufthansa.Outbound indirect flight with SWISS, departs from Washington Dulles on Mon, 22 Sep, arriving in Bilbao.Inbound indirect flight with Lufthansa, departs from Bilbao on Tue, 30 Sep, arriving in Washington Dulles.Price includes taxes and charges.From $749, select.
Bilbao.$838 per passenger.Departing Tue, 7 Apr, returning Tue, 14 Apr.Return flight with TAP Air Portugal.Outbound indirect flight with TAP Air Portugal, departs from Washington Dulles on Tue, 7 Apr, arriving in Bilbao.Inbound indirect flight with TAP Air Portugal, departs from Bilbao on Tue, 14 Apr, arriving in Washington Dulles.Price includes taxes and charges.From $838, select.
Bilbao.$874 per passenger.Departing Mon, 25 Aug, returning Mon, 1 Sep.Return flight with SWISS and Lufthansa.Outbound indirect flight with SWISS, departs from Washington Dulles on Mon, 25 Aug, arriving in Bilbao.Inbound indirect flight with Lufthansa, departs from Bilbao on Mon, 1 Sep, arriving in Washington Dulles.Price includes taxes and charges.From $874, select.
Bilbao.$890 per passenger.Departing Sun, 23 Nov, returning Sun, 30 Nov.Return flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from Washington Dulles on Sun, 23 Nov, arriving in Bilbao.Inbound indirect flight with Lufthansa, departs from Bilbao on Sun, 30 Nov, arriving in Washington Dulles.Price includes taxes and charges.From $890, select.

Find the cheapest month to fly from Washington Dulles to Bilbao

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Washington Dulles to Bilbao flights are currently cheapest in October.
Aug
from $945
Sep
from $749
Oct
from $723
Nov
from $890
Dec
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Jan
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Feb
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Mar
from $723
Apr
from $838
May
from $1,010
Jun
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Jul
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Washington Dulles to Bilbao: Alternative routes

Compare routes from Washington Dulles to Bilbao below. You may find an airport to fly into that's cheaper, faster, or easier than Bilbao.

Washington D.C. to Bilbao: Flight information

The things to know before you go.
Cheapest flight found$721
Cheapest month to flySeptember

Finding cheap flights from Washington Dulles to Bilbao: Frequently asked questions

The best price we found for a return flight from Washington Dulles to Bilbao is $721. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Washington Dulles to Bilbao. But we found flights with one or more stops from $721.
As of August 2025, there are no flights flying from Washington Dulles to Bilbao.
The cheapest month to fly from Washington Dulles to Bilbao is usually September.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Washington Dulles Airport to Bilbao Airport on Monday, 29 September 2025.
No airlines currently offer direct flights between Washington Dulles Airport and Bilbao Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Bilbao but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Bilbao is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, TAP Air Portugal offers the cheapest flight tickets to Bilbao.

Travelling from Washington Dulles International Airport (IAD) to Bilbao Airport (BIO): what you need to know

  • The timezone in Bilbao is UTC+1, which is five hours ahead of Washington DC.

  • Your IAD to BIO flight won't wait if you're running late, so don't forget to check in on time. Arrive up to one hour in advance for domestic flights and two hours ahead when you're travelling internationally.

  • During popular months such as April, it's a good idea to get to the airport well in advance. Plan to arrive two hours before domestic departures and four hours ahead of an international flight when you fly during peak periods in general.

  • Think about adding a stopover when booking your ticket from Washington Dulles International Airport to Bilbao Airport. Simply deselect 'Direct flights only' to break up your journey, or maybe even explore a new city along the way. Here's where you can stop between IAD and BIO:

    • Charles de Gaulle Airport

    • Barcelona-El Prat Airport

    • Amsterdam Airport Schiphol

How to find the cheapest flights from Washington Dulles International Airport (IAD) to Bilbao Airport (BIO)

  • The lowest price we've found for a one-way Washington Dulles International Airport to Bilbao Airport flight is $399. A round-trip fare right now is $721. Depending on the availability and when you book, these fares may change.

  • Don't leave everything to the last minute. You're more likely to get cheap tickets from IAD to BIO if you book early. Airlines often offer some fantastic early bird discounts.

  • Getting cheap flights from Washington Dulles International Airport to Bilbao Airport is easy if you're flexible with your travel dates. Use the 'Whole month' search function to see the lowest fares across every month and land a great deal.

  • Never miss a deal on cheap flights from IAD to BIO by setting up a Price Alert. We'll send you an email or notification through the app when a lower fare pops up.

  • Discover the perfect flight for you by using the filters. To see the 'Fastest,' 'Cheapest' or 'Best' flights from Washington Dulles International Airport to Bilbao Airport, use the 'Sort by' tool. You can also filter results by airline, departure and arrival times, and number of stops.

Handy information about Washington Dulles International Airport (IAD)

  • You'll find IAD at 1 Saarinen Circle.

  • Of all flights departing from Washington Dulles International Airport, 74.39% arrive on time at their destination.

  • Washington Dulles International Airport is around 56 kilometres from central Washington DC. If you're driving, ride-sharing or catching a cab from the centre, it'll take 50 minutes or so to get there, depending on the traffic.

  • You can expect a trip time of about 3 hours 25 minutes when using public transport.

  • Searching for a handy hotel close to IAD? If you're boarding an early flight from Washington Dulles International Airport to Bilbao Airport, these stays will put you moments from your check-in counter:

Arriving at Bilbao Airport (BIO)

  • If you're arriving on a late Washington Dulles International Airport to Bilbao Airport flight, nothing beats the convenience of staying close to the terminal. Grab your bags from the carousel and then be showered and relaxing soon after at one of these options near BIO:

  • Explore without limits with a Bilbao Airport rental car. Pick up a set of wheels from Record Go, Click and Rent or Goldcar and experience more of Bilbao and beyond.

  • To get the lowest price, book your vehicle from Bilbao Airport around four weeks ahead.

Getting from Bilbao Airport (BIO) to central Bilbao

  • Bilbao Airport to the centre of Bilbao has a drive time of around 10 minutes. It's approximately 6 kilometres away.

  • Getting to the centre by public transport takes around 30 minutes.

When to fly to Bilbao Airport (BIO)

  • The quietest month for a flight from Washington Dulles International Airport to Bilbao Airport is January, while July is the busiest. Choose the best time to visit Bilbao based on whether you prefer a faster pace or a more relaxed vibe.

  • The warmest month in Bilbao is August, with the temperature ranging between 16ºC (61ºF) and 25ºC (77ºF). Book your flights from Washington Dulles International Airport to Bilbao Airport in this month if this is the type of weather you like.

  • If you want to travel in cooler conditions, look for a cheap ticket from IAD to BIO in January. Average temperatures are between 5ºC (41ºF) and 13ºC (55ºF) then.

Explore more of Spain

  • Zaragoza is just one of the many places in Spain waiting to be discovered once you've taken in the sights of Bilbao. Around 241 kilometres away to the south-east, popular attractions include Puente de Piedra, Museo Pablo Gargallo and El Tubo.

  • Salamanca is another well-known destination in Spain and is around 338 kilometres south-west of Bilbao. No trip is complete without seeing Plaza Mayor, S.O.U. Servicio de Orientación al Universitario. Universidad de Salamanca and Pontifical University of Salamanca.

Plan the rest of your trip from Washington D.C. to Bilbao

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.