PHL - BIO

$490 Find Cheap Flights from Philadelphia to Bilbao

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Philadelphia to Bilbao departing on 3/18. 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, 0 bags

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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Everything you should know

Cheapest round-trip
$490
Typical prices: $622-$691
United Airlines
Wed 3/18Wed 3/25
PHL - BIO • 2 stops
Cheapest one-way
$5,513
Iberia
Fri 5/22
PHL - BIO • 2 stops
Top airlines
United Airlines
Cheapest • from $490 (round-trip)
Iberia
Best reviews • 7.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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Flight Deals
Booking Insights
Flight Deals

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

Wed, Mar 18 - Wed, Mar 25
United Airlines Logo
7:45 pm - 6:05 pm
PHL
-
BIO
17h 20m
2 stops
United Airlines Logo
11:35 am - 12:16 am
BIO
-
PHL
17h 41m
2 stops
$490United Airlines
Wed, Mar 4 - Sun, Mar 8
United Airlines Logo
10:06 am - 6:05 pm
PHL
-
BIO
25h 59m
2 stops
United Airlines Logo
6:45 am - 4:05 pm
BIO
-
PHL
15h 20m
1 stop
$528United Airlines
Wed, Mar 4 - Sun, Mar 8
United Airlines Logo
10:06 am - 6:05 pm
PHL
-
BIO
25h 59m
2 stops
United Airlines Logo
6:45 am - 4:05 pm
BIO
-
PHL
15h 20m
1 stop
$529United Airlines
Wed, Apr 29 - Wed, May 13
Iberia Logo
8:30 pm - 12:45 pm
PHL
-
BIO
10h 15m
1 stop
Iberia Logo
9:35 pm - 5:30 pm
BIO
-
PHL
25h 55m
1 stop
$533Iberia
Wed, Apr 29 - Wed, May 13
Delta Logo
9:25 am - 9:50 am
PHL
-
BIO
18h 25m
2 stops
Delta Logo
10:30 am - 9:13 pm
BIO
-
PHL
16h 43m
2 stops
$573Delta
Wed, Apr 29 - Wed, May 13
Multiple Airlines Logo
3:30 pm - 5:55 pm
PHL
-
BIO
20h 25m
2 stops
Multiple Airlines Logo
6:50 am - 4:05 pm
BIO
-
PHL
15h 15m
1 stop
$601Multiple Airlines
Wed, Mar 18 - Wed, Mar 25
Iberia Logo
7:45 pm - 1:00 pm
PHL
-
BIO
12h 15m
1 stop
Iberia Logo
9:15 am - 4:55 pm
BIO
-
PHL
12h 40m
1 stop
$631Iberia
Fri, May 29 - Sat, Jun 6
Iberia Logo
8:30 pm - 12:45 pm
PHL
-
BIO
10h 15m
1 stop
Iberia Logo
9:35 pm - 8:25 pm
BIO
-
PHL
28h 50m
2 stops
$768Iberia
Wed, Mar 4 - Sun, Mar 8
Iberia Logo
7:45 pm - 6:50 pm
PHL
-
BIO
17h 05m
1 stop
Iberia Logo
9:15 am - 4:55 pm
BIO
-
PHL
12h 40m
1 stop
$770Iberia
Wed, Mar 4 - Sun, Mar 8
Iberia Logo
7:45 pm - 8:50 pm
PHL
-
BIO
19h 05m
1 stop
Iberia Logo
9:35 pm - 4:20 pm
BIO
-
PHL
47h 45m
2 stops
$771Iberia
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.

Which airlines provide the cheapest flights from Philadelphia to Bilbao?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Philadelphia to Bilbao were found on United Airlines ($490) and Iberia ($533).

Good to know

Low seasonFebruary
Cheapest flight$490
Best time to beat the crowds with an average 28% drop in price.
Most popular time to fly with an average 8% 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 $5,513 for a one-way ticket and $490 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?

    oneworld, and Star Alliance are the airline alliances operating flights between Philadelphia and Bilbao, with oneworld 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 $1,009 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 $911 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 3100 reviews
7.7Crew
7.2Boarding
6.4Food
6.6Entertainment
6.8Comfort
Airline reviews

The pilot was professional and very good. The flight crew, very young and often looked flustered and overwhelmed. The seats were among the most uncomfortable in the air. The boarding somewhat chaotic. The price reasonable. Overall it was an average budget airline experience...although Iberia is not a budget airline. I fear if Iberia doesn't up it's game customers like us will go elsewhere.

4.0 OkayCFJ, Jan 2026
VCE - MAD
Read more Iberia reviews

The pilot was professional and very good. The flight crew, very young and often looked flustered and overwhelmed. The seats were among the most uncomfortable in the air. The boarding somewhat chaotic. The price reasonable. Overall it was an average budget airline experience...although Iberia is not a budget airline. I fear if Iberia doesn't up it's game customers like us will go elsewhere.

Bad weather Excelent pilot Spoke British 😆on time seats small ad expected in a discount airline

It wasn’t great because the third-party from Kayak there was just no information about how to check in with Vueling. And the purchase of the ticket from under pricer just made everything really difficult. I’m unlikely to use Kayak again for these reasons.

It was fine, older plane with limited entertainment, otherwise fine.

the seats were bad and uncomfortable and the food was not tasty.

the seats were so cramped you could barely move. it was difficult to eat when passengers would recline their seats. the seats were so flimsy and unstable that whenever someone got in and out of their seat, it bounced like a spring back in your face. the movies were nice. the food was terrible. even though the conditions were terrible, they tried to pressure passengers to relocate their seats to accommodate adults who were related and wanted to sit next to each other, even after the passengers expressed that they did not want to move for that purpose. on the connecting flight, the “service” consisted of items for purchase. even though the flight was only 45 minutes, once again passengers (including me) were pressured to relocate for people to sit next to each other. they couldn’t be apart for 45 minutes? this was much less compelling than being apart for an 8 hour flight.

Everything went smoothly, and we even arrived 40min earlier than scheduled, on an Orland-Madrid route.

It was budget airline Veuling, even though we booked Iberia.

The staff was very nice and helpful. Some of the best crew I have met.

Bad experience. The seat room are very tight. The food is not good and the breakfast has no hot drink.

Service and food were excellent. Incredibly friendly and competent staff. Flight was delayed over and hour and I had to run between terminals to get my connecting flight.

Missed it by a couple minutes and couldn’t find an alternative flight so had to spend the night in DC and after much shuffling from 1 airline to another managed to get a United to Frankfurt.

There were only 2 toilets and one of them did not work in business class. We are not allowed to cross classes so had to wait in line to use the toilets!! The entertainment touch display was finicky and did not work all the time.

We missed our flight. There was not enough time built into the layover to get through immigration, customs, bagclaim, bag rechecking, and the long trip to another terminal and gate. Kayak really screwed up. We took the bus up to Wisconsin and then were picked up in Brookfield by private car. It was lucky we didnt miss the last bus out.

I tried both on line and by calling the Customer Service line to arrange for a special meal as i have food intolerances. I was under the impression from your service representative that I was successful. I was not. I cannot eat spicy foods and get very ill if i eat bell peppers. I could not eat either menu choice and no special meal was actually ordered. ( your representative tried to order it for a flight that did not have meal service!!! - found this out later). Your wonderful cabin crew managed to put together a fruit, salad, roll and cheese tray for me so I had something to eat. WHY WOULD YOU SERVE SPICY FOOD, WITH NO MILDER OPTION,ON AN INTERNATIONAL FLIGHT???

Crew was professional and great, flight was clean. However food was pathetic. I ordered a Hindu meal assuming no meat but they served chicken. Need to be very specific- Hindu meal should be categorize as Vegetarian - no meat or egg. Or it should be specific that we are serving meat.

Late flight Delays Poor service Poor staff Worst airline ever

Ground staff and cabin crew were excellent. Flight was perfectly on time. Zero issues.

Even after a delay, getting off the ground, thanks for keeping me safe, the airline made certain that my connecting flight was rebooked to get me to my final destination. It was actually rebooked twice, and my luggage still managed to meet me. The airline gave me a credit for food and beverage to be used at the airport vendors, regretfully, the credit did not transfer to my final boarding pass. Oh, well…

Trip was smooth, good drew, average meal, almost cold coffee. Excellent landing. Did not enjoy going down the stairs, walking to the gate, walking up the stairs, going a long walk to the exchange gate, and going down the stairs again to be bussed all the way where we originally landed to take our next flight! Over all an average experience. Thank you.

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

Information on your arrival and departure airports