PHL - BIO

$424 Find Cheap Flights from Philadelphia to Bilbao

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to Bilbao departing on 8/22. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Bilbao

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Bilbao, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Bilbao, as well as popular online travel agencies
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Cheap Flights from Philadelphia to Bilbao (PHL-BIO)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Philadelphia to Bilbao that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Philadelphia to Bilbao

Tue, Dec 9 - Wed, Dec 17
United Airlines Logo
5:40 pm - 12:05 pmPHL-BIO
12h 25m1 stop
United Airlines Logo
12:45 pm - 5:28 pmBIO-PHL
34h 43m2 stops
$609United Airlines
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Mon, Sep 22 - Sun, Sep 28
Lufthansa Logo
5:35 pm - 1:20 pmPHL-BIO
13h 45m1 stop
Lufthansa Logo
7:05 pm - 4:00 pmBIO-PHL
26h 55m1 stop
$668Lufthansa
Find Deal
Mon, Sep 15 - Mon, Sep 29
Iberia Logo
8:25 pm - 12:45 pmPHL-BIO
10h 20m1 stop
Iberia Logo
9:35 pm - 3:55 pmBIO-PHL
24h 20m1 stop
$704Iberia
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Mon, Sep 15 - Mon, Sep 29
 Logo
5:30 pm - 11:15 pmPHL-BIO
23h 45m2 stops
 Logo
6:45 am - 4:40 pmBIO-PHL
39h 55m2 stops
Mon, Sep 15 - Mon, Sep 29
Iberia Logo
10:47 am - 12:45 pmPHL-BIO
19h 58m2 stops
Iberia Logo
9:35 pm - 3:55 pmBIO-PHL
24h 20m1 stop
$709Iberia
Find Deal
Sat, Aug 16 - Sat, Aug 23
American Airlines Logo
8:25 pm - 8:30 amPHL-BIO
30h 05m1 stop
American Airlines Logo
9:15 am - 8:01 pmBIO-PHL
16h 46m2 stops
$796American Airlines
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Sat, Aug 16 - Sat, Aug 23
American Airlines Logo
8:25 pm - 8:30 amPHL-BIO
30h 05m1 stop
American Airlines Logo
9:15 am - 8:01 pmBIO-PHL
16h 46m2 stops
$798American Airlines
Find Deal
Sat, Aug 16 - Sat, Aug 23
KLM Logo
2:35 pm - 11:55 amPHL-BIO
15h 20m2 stops
KLM Logo
6:50 am - 5:36 pmBIO-PHL
16h 46m2 stops
$861KLM
Find Deal
Sat, Aug 16 - Sat, Aug 23
KLM Logo
2:35 pm - 11:55 amPHL-BIO
15h 20m2 stops
KLM Logo
12:00 pm - 11:51 pmBIO-PHL
17h 51m2 stops
$863KLM
Find Deal
Wed, Aug 27 - Wed, Sep 3
 Logo
6:45 pm - 6:20 pmPHL-BIO
17h 35m1 stop
 Logo
6:45 am - 10:08 pmBIO-PHL
21h 23m2 stops
Booking Insights

KAYAK's insights & trends for Philadelphia to Bilbao flights

Get data-powered insights and trends into flights from Philadelphia to Bilbao to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Philadelphia to Bilbao?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Philadelphia to Bilbao, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Philadelphia to Bilbao is January, where tickets cost $580 (return) on average. On the other hand, the most expensive months are November and June, where the average cost of round-trip tickets is $1,272 and $1,185 respectively.

Good to know

Low seasonFebruary
Cheapest flight$424
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly with an average 7% increase in price.
Flight from Philadelphia to Bilbao

When to book flights from Philadelphia to Bilbao

Are your dates flexible? Find out the best times to travel from Philadelphia to Bilbao based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Philadelphia to Bilbao

  • What is the cheapest flight from Philadelphia to Bilbao?

    In the last 3 days, the lowest price for a flight from Philadelphia to Bilbao was $424 for a one-way ticket and $609 for a round-trip.

  • Do I need a passport to fly between Philadelphia and Bilbao?

    Yes, you’ll need a passport to travel to Bilbao from Philadelphia.

  • Which aircraft models fly most regularly from Philadelphia to Bilbao?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Philadelphia to Bilbao?

    Star Alliance, oneworld, and SkyTeam are the airline alliances operating flights between Philadelphia and Bilbao, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Philadelphia to Bilbao, Iberia or Lufthansa?

    The two airlines most popular with KAYAK users for flights from Philadelphia to Bilbao are Iberia and Lufthansa. With an average price for the route of $1,005 and an overall rating of 7.0, Iberia is the most popular choice. Lufthansa is also a great choice for the route, with an average price of $930 and an overall rating of 6.8.

  • How does KAYAK find such low prices on flights from Philadelphia to Bilbao?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Philadelphia to Bilbao.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Philadelphia to Bilbao?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Bilbao from Philadelphia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Philadelphia to Bilbao?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Bilbao with an airline and back to Philadelphia with another airline. Booking your flights between Philadelphia and BIO can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia to Bilbao?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Bilbao from Philadelphia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Philadelphia to Bilbao

 
See real verified KAYAK customer reviews for airlines flying from Philadelphia to Bilbao. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Philadelphia to Bilbao? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.0
IberiaOverall score based on 2862 reviews
7.1Boarding
6.7Comfort
6.6Entertainment
6.3Food
7.6Crew
Airline reviews

Horrible experience airline crew was unprofessional. Flight was delayed. Suit cases did not arrive. Never flying iberia again

2.0 MediocreJackie, Jul 2025BCN - MAD
Read more Iberia reviews

Horrible experience airline crew was unprofessional. Flight was delayed. Suit cases did not arrive. Never flying iberia again

People point to America as the model of late stage capitalism. My friends, airlines in america at least give you WiFi, and they haven’t quite smashed people into cardboard tv dinner trays yet. Iberia has mastered the tv dinner seat and WiFi is 20 euros. Be serious yall.

Iberia lost my bag, said they found it in another country, said they sent it to me, but never did. Went my whole trip without my stuff, but expecting it to show up because that’s what they said would happen. Their communication sucks, their website sucks, and to top it all off, their seats are small and uncomfortable. They’re bad at their jobs and they should feel bad about themselves. Do not even get me started on the flight home. AVOID!

The flight was delayed over 4 hours. Business class is just slightly upgraded economy.

Delayed and missed connections on leaving the states and returning Planes were old and small- very uncomfortable. Meals were good but very infrequent service for even water/drinks. No explanations for 3+ hour delay

Boarding on the buses isn’t efficient. Overall, it was great.

I liked the comfort of the plane. It was unexpected from past experiences.

BEWARE!!! Iberia changes your seats at random. I paid for a window seat and they changed it to one in the middle aisle resting against the bathroom- can’t lean back + hear every flush. This on a 11 hour flight.. There were families that were broken up with separate seats all over the plane. Lots of upset passengers showing their seat confirmation to the besieged and helpless airline steward. Also, the gluten free meal was tasteless.

Chair is very high. Your feet cannot touch the ground for 8 hours flight. It was a nightmare. Food was bad.

Iberia airlines was late on every flight I had. It was very difficult to communicate in English with iberia airlines and airport employees.

Our flight was delayed for over an hour due to weather, and it had already been a long travel day. However, the crew was calm and compassionate, listening to every complaint with genuine concern. They got us home safely without incident, in spite of all of the obstacles. I’m grateful.

Hate their old flights, boatding, food and services. Very poor quality

Insulting. Lufthansa flight from Munich to EWR had us getting our luggage when we were told in Florence that it would follow us to Indianapolis. It did not. Then very slow security in EWR caused me and three other passengers from Lufthansa flight from Munich to miss the boarding closure. Behind me were two elderly grandparents and their ten year old grandson. We were all refused entry on a plane to Indy that was still at the gate. The doors had not even closed inside the terminal yet. No apologies or compensation offered. Not even a meal voucher let alone a free hotel stay for our inconvenience. I m not sure what the other three passengers behind me did ( they were elderly with a grandson, recall), but I stated 12 hours overnight in a chilly EWR airport until next flight to Indy at 850 next morning.

The food could be better, more snacks. And have some plugs to chargue the phone.

The pasta in the evening meal was tasteless. Otherwise, the flight was okay.

Everything was really great just The aircraft was too old and sounded it will break during takeoff

Seating was average for a first class seat. It very modern. I expected better.

Flight was a little late. The crew was courteous, food ok

Bad! Disaster!! The LH419 was cancelled after 4 hrs on board with no AC and no toilets

Poor food on flight between Toronto and Stockholm Airport Toronto too crowded

Everything you need to know for your flight from Philadelphia to Bilbao

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