PHL - BIO

$331 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 8/2. 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
$710
Typical prices: $1,005-$664
Air Canada
Tue 9/15Tue 9/29
PHL - BIO • 2 stops
Cheapest one-way
$331
KLM
Sun 8/2
PHL - BIO • 2 stops
Top airlines
Cheapest • from $725 (round-trip)
Best reviews • 7.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Philadelphia and Bilbao. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $708 (round-trip)
Shortest trip • 10h 56m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 100% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Bilbao!
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

Tue, Sep 15 - Tue, Sep 29
Multiple Airlines Logo
3:25 pm - 5:55 pm
PHL
-
BIO
20h 30m
2 stops
Multiple Airlines Logo
11:00 am - 9:32 pm
BIO
-
PHL
16h 32m
2 stops
$710Multiple Airlines
Tue, Sep 15 - Tue, Sep 29
United Airlines Logo
9:52 am - 10:45 am
PHL
-
BIO
18h 53m
2 stops
United Airlines Logo
6:50 am - 4:05 pm
BIO
-
PHL
15h 15m
1 stop
$725United Airlines
Tue, Sep 15 - Tue, Sep 29
Multiple Airlines Logo
3:25 pm - 5:55 pm
PHL
-
BIO
20h 30m
2 stops
Multiple Airlines Logo
6:50 am - 4:05 pm
BIO
-
PHL
15h 15m
1 stop
$727Multiple Airlines
Tue, Sep 15 - Tue, Sep 29
Lufthansa Logo
5:40 pm - 5:10 pm
PHL
-
BIO
17h 30m
1 stop
Lufthansa Logo
6:50 am - 4:05 pm
BIO
-
PHL
15h 15m
1 stop
$729Lufthansa
Wed, Aug 5 - Wed, Aug 19
United Airlines Logo
6:10 am - 4:00 pm
PHL
-
BIO
27h 50m
2 stops
United Airlines Logo
6:50 am - 4:05 pm
BIO
-
PHL
15h 15m
1 stop
$730United Airlines
Tue, Sep 15 - Tue, Sep 29
Lufthansa Logo
5:40 pm - 5:10 pm
PHL
-
BIO
17h 30m
1 stop
Lufthansa Logo
6:50 am - 4:05 pm
BIO
-
PHL
15h 15m
1 stop
$735Lufthansa
Wed, Aug 5 - Wed, Aug 19
Delta Logo
6:00 am - 9:50 am
PHL
-
BIO
21h 50m
2 stops
Delta Logo
6:45 am - 6:29 pm
BIO
-
PHL
17h 44m
2 stops
$736Delta
Mon, Aug 10 - Thu, Aug 20
Multiple Airlines Logo
2:32 pm - 11:15 pm
PHL
-
BIO
26h 43m
2 stops
Multiple Airlines Logo
6:45 am - 9:10 pm
BIO
-
PHL
20h 25m
2 stops
$746Multiple Airlines
Mon, Aug 10 - Thu, Aug 20
United Airlines Logo
3:10 pm - 10:10 am
PHL
-
BIO
37h 00m
2 stops
United Airlines Logo
6:50 am - 4:05 pm
BIO
-
PHL
15h 15m
1 stop
$747United Airlines
Wed, Aug 5 - Wed, Aug 19
Multiple Airlines Logo
2:32 pm - 11:15 pm
PHL
-
BIO
26h 43m
2 stops
Multiple Airlines Logo
6:45 am - 5:35 pm
BIO
-
PHL
16h 50m
1 stop
$784Multiple Airlines
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.

How much is a round-trip flight from Philadelphia to Bilbao?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Philadelphia to Bilbao departing in September.

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 December, where tickets cost $0 (return) on average. On the other hand, the most expensive months are June and August, where the average cost of round-trip tickets is $1,235 and $1,118 respectively.

Good to know

Low seasonFebruary
Cheapest flight$331
Best time to beat the crowds with an average 33% drop in price.
Most popular time to fly with an average 4% 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 $331 for a one-way ticket and $710 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, and oneworld 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 $909 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 $689 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 3212 reviews
6.6Entertainment
7.2Boarding
6.7Comfort
6.3Food
7.7Crew
Airline reviews

I’m an Iberia fan but this time They dropped the ball. I went from ALC to MAD to LHR. Boarding in ALC was by group… to get you in a bus. Then we sat for almost an hour when most people had connections. When we landed in Madrid we did so and they put us in another bus almost like if they wanted to make people lose their connection. We made ours by the skin of our teeth but our luggage did not. And on top of this we had to listen to the pilot bragging about Iberia being punctual. To be true we made it on time to LHR but we are Still waiting for our luggage

2.0 MediocreFelix, May 2026
ALC - MAD
Read more Iberia reviews

I’m an Iberia fan but this time They dropped the ball. I went from ALC to MAD to LHR. Boarding in ALC was by group… to get you in a bus. Then we sat for almost an hour when most people had connections. When we landed in Madrid we did so and they put us in another bus almost like if they wanted to make people lose their connection. We made ours by the skin of our teeth but our luggage did not. And on top of this we had to listen to the pilot bragging about Iberia being punctual. To be true we made it on time to LHR but we are Still waiting for our luggage

I have to compare it to the AA flight back home. AA was a little better. Perhaps it was that American English is my native tongue. My seat on AA was newer and more comfortable. The food was a little better. The entertainment was much better, more movies worth watching. The sound was lousy on both.

Excellent liked business class except wife’s luggage was lost on 10 Hours connecting flight to Miami and we were priority! 1:20 layover! Expect better From American Airlines partner

Service was good , communication and emails were in Spanish though I booked in English , end up figuring it out but also flight was partnered with air maroc and I had to call them to check on not Iberea doesn’t make sense

In general, I've had excellent experiences with Iberia flights and will continue to use them. In this last flight there were two things that didn't go right. I didn't get the kosher meal I had pre-requested when I had checked in on-line. Things worked out OK as we ended up eating the fish and vegetarian choices, which were really good. The other issue was that some movies for me and my wife started fine but after 8-12 minutes the content just switched to something else. The flight attendant reset our entertainment systems, but the problem persisted. We ended up choosing other movies/TV shows that did work fine.

Awful. They didn't even show concern that her connecting flight( Dallas to Mardrid) was gone/missing. I don't understand how that is even possible. Rudest answer from one of the crew was that American Airlines sold the tickets to somebody else. My daughter was not in the list.

The flight was canceled on a Thursday last minute. I lost thousands of dollars in hotels and car rental

Excellent lie flat seat for premium economy! Great staff. Bad food . Not so great entertainment. My bag didn’t make it either.

Really like the idea experience on this airline I will use again

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.

Definitely get premium economy on a flight this long if you can. Your legs and while body will thank you.

Flight was delayed by several hours and then cancelled due to weather. But Staff was very helpful getting me on a different flight. United should offer food coupons and tooth brush and paste for stranded passengers

I upgraded to the business class cabin. It was the poorest business class I have ever experienced. No access to any business lounge in Tampa airport. Seats are not comfortable. I had a window seat and had to step/crawl over the next seat. Food was mediocre and service below average for business class. Bathroom location was ridiculous. No place to wait. I cannot believe I paid this kind of money and will never fly Lufthansa Discover again. They really should reimburse me somehow.

Boarding was disorganized. The door to one to the toilets wouldn’t lock. The plane was shockingly cramped, and clearly used for domestic flights due to the menus for items to sell domestic travelers. United should be ashamed of its small seats, tiny unclean toilets, and money grubbing stance toward services, compared to Lufthansa, Emirates, and most international carriers United is awful.

Catastrophic experience the gate selected customers were picked up to.pay 70 eur for overweight 1-2 kg. While some others were let to board without chcking their carry on bags. Unecessaey drama by Lufthansa that brings nothing just hating them by customers.

Was never allowed on and not refunded the full amount of the ticket plus charged a $300 processing fee.

Terrible. Lost our luggage for 4 days. Did not advise passengers there was a strike in Barcelona Airport and had zero personnel on hand at airport to advise passengers on where to go to file claims. We had to fend for ourselves. No assistance at all other than an online claims submission process that we had to find out about on our own.

Lufthansa cancelled our flight from Los Angeles to Naples Italy on March 10 for scheduled flight on March 12 Very stressful experience trying to arrange alternatives. Will never fly again with Lufthansa

Everything could have been better. What needed to be wrong with United went wrong

The staff was bit rude when I asked for an extra drink after one beer, asked for one wine glass.

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

Information on your arrival and departure airports