PHL - BIO

$695 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 8/25. 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$695
Typical prices: $1,047-$884
KLM
Tue 8/25Tue 9/8
PHL - BIO • 2 stops
Cheapest one-way
$1,241
Multiple Airlines
Sun 7/5
PHL - BIO • 1 stop
Top airlines
Cheapest • from $695 (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 $659 (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, Aug 25 - Tue, Sep 8
KLM Logo
1:15 pm - 11:55 am
PHL
-
BIO
16h 40m
2 stops
KLM Logo
8:20 am - 7:58 pm
BIO
-
PHL
17h 38m
2 stops
$695KLM
Wed, Sep 2 - Tue, Sep 15
United Airlines Logo
10:30 am - 5:55 pm
PHL
-
BIO
25h 25m
2 stops
United Airlines Logo
6:50 am - 4:05 pm
BIO
-
PHL
15h 15m
1 stop
$727United Airlines
Wed, Sep 2 - Tue, Sep 15
Air Canada Logo
10:05 am - 5:55 pm
PHL
-
BIO
25h 50m
2 stops
Air Canada Logo
6:50 am - 9:32 pm
BIO
-
PHL
20h 42m
2 stops
$729Air Canada
Mon, Aug 31 - Thu, Sep 17
United Airlines Logo
7:40 pm - 10:45 am
PHL
-
BIO
33h 05m
2 stops
United Airlines Logo
6:50 am - 4:05 pm
BIO
-
PHL
15h 15m
1 stop
$730United Airlines
Mon, Aug 31 - Fri, Sep 18
United Airlines Logo
7:40 pm - 10:45 am
PHL
-
BIO
33h 05m
2 stops
United Airlines Logo
12:30 pm - 2:20 pm
BIO
-
PHL
31h 50m
2 stops
$731United Airlines
Tue, Sep 1 - Wed, Sep 16
Lufthansa Logo
5:40 pm - 1:20 pm
PHL
-
BIO
13h 40m
1 stop
Lufthansa Logo
6:50 am - 4:05 pm
BIO
-
PHL
15h 15m
1 stop
$735Lufthansa
Tue, Sep 1 - Wed, Sep 16
Delta Logo
6:00 am - 9:50 am
PHL
-
BIO
21h 50m
2 stops
Delta Logo
12:00 pm - 4:15 pm
BIO
-
PHL
34h 15m
2 stops
$736Delta
Tue, Aug 25 - Tue, Sep 8
Multiple Airlines Logo
5:40 pm - 1:20 pm
PHL
-
BIO
13h 40m
1 stop
Multiple Airlines Logo
6:50 am - 2:47 pm
BIO
-
PHL
37h 57m
2 stops
$739Multiple Airlines
Wed, Aug 5 - Wed, Aug 19
Delta Logo
5:29 pm - 4:30 pm
PHL
-
BIO
17h 01m
2 stops
Delta Logo
6:45 am - 10:16 pm
BIO
-
PHL
21h 31m
2 stops
$740Delta
Wed, Sep 2 - Thu, Sep 17
Lufthansa Logo
5:40 pm - 5:15 pm
PHL
-
BIO
17h 35m
1 stop
Lufthansa Logo
6:50 am - 4:05 pm
BIO
-
PHL
15h 15m
1 stop
$741Lufthansa
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 December, where tickets cost $0 (return) on average. On the other hand, the most expensive months are August and June, where the average cost of round-trip tickets is $1,118 and $998 respectively.

Good to know

Low seasonFebruary
Cheapest flight$695
Best time to beat the crowds with an average 31% drop in price.
Most popular time to fly with an average 6% 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 5 days, the lowest price for a flight from Philadelphia to Bilbao was $1,241 for a one-way ticket and $695 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 $673 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 3237 reviews
6.3Food
7.2Boarding
6.7Comfort
7.7Crew
6.6Entertainment
Airline reviews

Terrible boarding procedures in Madrid. The airplane barely has any legroom and I am 68 inches.

6.0 GoodFelix, Jun 2026
VCE - MAD
Read more Iberia reviews

Terrible boarding procedures in Madrid. The airplane barely has any legroom and I am 68 inches.

Not bad but they lost 2 of my bags when I got to Florence

Couldn’t get boarding passes online, delayed an hour, and smallest amount of space on board I’ve ever encountered for such a long flight.

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

We sat in our seats on the tarmac for almost 3 hours due to storms. They would not give us water or a snack. We were to depart at 7.30 pm and it was about 10.30 when we took off. No dinner until much after that. Beef type noodle dish was terrible with about a teaspoon of beef in it. The breakfast sweet waffle with egg and sausage inside was horrible. An English muffin sandwich would have been much better. Food was the worst in all of our years of traveling the world.

Our screen kept turning off ...3 times...had to get crew attention to turn it on again

They messed up my seat so I didn’t get the one I paid for

Put me on standby; flight was late; missed my connecting flight; disaster

Flight attendants were fine, seats a bit hard but I use a cushion for extra support. The only issue was it was a bit too cool and I needed to ask for and received and extra blanket. I survived!!!

Very few things and/or people are excellent. It was very good.

Extremely uncomfortable seats. Experience was like a Frontier Airlines flight. Would not fly it again.

Very, very tight legroom. They must’ve jammed in an additional few rows of seat seating. Denver to Munich was the least legroom I’ve ever had on any flight, let alone a multi hour international journey. I will not take that flight again.

In my first flight with Air Canada we sat in the plane for 4:00pm to 6:30pm. Finally we were asked to get off the plane and we were told the flight was cancelled after 7:00pm There was o clear explanation of what was the problem. I was booked without my permission on a Delta Flight at 7:30pm that was leaving at 8:00pm and I still had to go get my luggage(my final destination was Rome with one stop in Toronto. The luggage claim for Canada was closed so had to return to finally get it on the luggage belt.. Of course I missed the Delta flight and all the next day flights were booked. I also lost what I paid for my stay in Rome because I did nt cancel in time. A complete nightmare.

This is a very basic flight with no-frills. I just wish the seats were a little bit more comfortable.

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

Information on your arrival and departure airports