PHL - BIO

$350 Find Cheap Flights from Philadelphia to Bilbao - Compare and Save

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 12/9. 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

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Everything you should know

Cheapest round-trip
$678
Typical prices: $904-$1,088
Multiple Airlines
Sun 10/18Wed 10/28
PHL - BIO • 2 stops
Cheapest one-way
$350
Delta
Wed 12/9
PHL - BIO • 2 stops
Top airlines
Cheapest • from $697 (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 $786 (round-trip)
Shortest trip • 11h 27m (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
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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

Sun, Oct 18 - Wed, Oct 28
Multiple Airlines Logo
10:05 am - 9:25 amPHL  Philadelphia-BIO Bilbao
17h 20m2 stops Montreal Pierre Elliott Trudeau Intl Zurich
Multiple Airlines Logo
7:30 am - 10:56 pmBIO  Bilbao-PHL Philadelphia
20h 26m2 stops Munich Franz Josef Strauss Toronto Pearson Intl
$678Multiple Airlines
Sun, Oct 18 - Wed, Oct 28
Multiple Airlines Logo
5:40 pm - 5:00 pmPHL  Philadelphia-BIO Bilbao
17h 20m1 stop Frankfurt am Main
Multiple Airlines Logo
7:30 am - 10:56 pmBIO  Bilbao-PHL Philadelphia
20h 26m2 stops Munich Franz Josef Strauss Toronto Pearson Intl
$693Multiple Airlines
Sun, Sep 20 - Tue, Sep 29
Multiple Airlines Logo
10:50 am - 10:20 amPHL  Philadelphia-BIO Bilbao
17h 30m2 stops Toronto Pearson Intl Frankfurt am Main
Multiple Airlines Logo
6:50 am - 10:46 pmBIO  Bilbao-PHL Philadelphia
21h 56m2 stops Frankfurt am Main Toronto Pearson Intl
$696Multiple Airlines
Tue, Sep 22 - Tue, Sep 29
United Airlines Logo
10:30 am - 5:55 pmPHL  Philadelphia-BIO Bilbao
25h 25m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss
United Airlines Logo
6:50 am - 4:05 pmBIO  Bilbao-PHL Philadelphia
15h 15m1 stop Frankfurt am Main
$697United Airlines
Sun, Oct 18 - Wed, Oct 28
Lufthansa Logo
5:40 pm - 1:20 pmPHL  Philadelphia-BIO Bilbao
13h 40m1 stop Frankfurt am Main
Lufthansa Logo
5:50 pm - 5:05 pmBIO  Bilbao-PHL Philadelphia
28h 15m1 stop Frankfurt am Main
$703Lufthansa
Thu, Oct 8 - Wed, Oct 14
Lufthansa Logo
5:40 pm - 5:00 pmPHL  Philadelphia-BIO Bilbao
17h 20m1 stop Frankfurt am Main
Lufthansa Logo
6:50 am - 4:05 pmBIO  Bilbao-PHL Philadelphia
15h 15m1 stop Frankfurt am Main
$745Lufthansa
Thu, Sep 17 - Thu, Sep 24
Lufthansa Logo
5:40 pm - 1:15 pmPHL  Philadelphia-BIO Bilbao
13h 35m1 stop Frankfurt am Main
Lufthansa Logo
6:50 am - 4:05 pmBIO  Bilbao-PHL Philadelphia
15h 15m1 stop Frankfurt am Main
$745Lufthansa
Tue, Sep 22 - Tue, Sep 29
Iberia Logo
4:20 pm - 8:30 amPHL  Philadelphia-BIO Bilbao
10h 10m1 stop Madrid Barajas
Iberia Logo
6:45 am - 5:45 pmBIO  Bilbao-PHL Philadelphia
17h 00m1 stop Madrid Barajas
$796Iberia
Tue, Sep 8 - Tue, Sep 22
Iberia Logo
5:30 pm - 12:45 pmPHL  Philadelphia-BIO Bilbao
13h 15m2 stops Boston Logan Intl Madrid Barajas
Iberia Logo
9:35 pm - 5:45 pmBIO  Bilbao-PHL Philadelphia
26h 10m1 stop Madrid Barajas
$841Iberia
Tue, Sep 8 - Tue, Sep 22
Iberia Logo
8:20 pm - 11:15 pmPHL  Philadelphia-BIO Bilbao
20h 55m1 stop Madrid Barajas
Iberia Logo
9:15 am - 8:43 pmBIO  Bilbao-PHL Philadelphia
17h 28m2 stops Madrid Barajas Boston Logan Intl
$845Iberia
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 June, where tickets cost $0 (return) on average. On the other hand, the most expensive months are August and January, where the average cost of round-trip tickets is $1,118 and $1,057 respectively.

Good to know

Low season

February

Cheapest flight

$350
Best time to beat the crowds with an average 33% drop in price.
Most popular time to fly with an average 3% 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 $350 for a one-way ticket and $678 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 $910 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 3265 reviews
7.7Crew
6.6Entertainment
6.7Comfort
7.1Boarding
6.3Food
Airline reviews

We were bumped out of bulkhead seats we purchased a year ago. We were moved to row 5 and the folks in row 4 fully reclined making it difficult to get out to use the restroom. The seat have too little padding making them uncomfortable 3 hours into the flight. The movies did not offer closed captioning and the earbuds were poor so the entertainment was mostly unusable. The food was just passable. I would not fly Iberia/level again. Iberia also bumped us off our direct return flight so I would say the whole experience with this airline is poor.

4.0 OkayAnonymous, Jul 2026
Read more Iberia reviews

We were bumped out of bulkhead seats we purchased a year ago. We were moved to row 5 and the folks in row 4 fully reclined making it difficult to get out to use the restroom. The seat have too little padding making them uncomfortable 3 hours into the flight. The movies did not offer closed captioning and the earbuds were poor so the entertainment was mostly unusable. The food was just passable. I would not fly Iberia/level again. Iberia also bumped us off our direct return flight so I would say the whole experience with this airline is poor.

The flight was operated by level, who had a sister’s check in procedure (2 hours) due to understaffing and a computer malfunction. While 3 agents stood at the business check in, with a total of maybe one actual customer there at a time, a huge line formed at economy check in with only 1 agent staffing the check in. Then, my luggage was lost - a guitar case with contents inside valued at 3,000 USD. The computer system of LEVEL could not locate my bag and had no record of it, and IBERIA (with whom I purchased my ticket and the checked bag) refused to help. It was a disastrous experience and I will never book Iberia again

It was a good flight overall. Nothing to add. Keep it up!

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

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

Flight was delayed 3 hours and 15 minutes. The delay caused me to miss my tour group due to arriving late.

Flight boarded three hours late for no reason other than someone made a huge error in crew scheduling. We missed our connecting flight in Madrid and got zero help from American or Iberian airlines on rebooking. We had to pay for a car to take us to the Madrid train station and pay for train tickets to Santiago. We never used our booked flight to Santiago. American claims I can submit the expenses but they are not obligated to cover them. Very frustrating.

Super uncomfortable main cabin. Omg no leg space or seat space horrible

The trays weren’t wiped. They still had food from last passengers

Flight reservation was canceled withou notice had to spend the night in the airport

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

Booked Economy but it translated to economy light for Lufthansa so now we are stuck paying an extra $75 per person both ways for our checked bags. If I had known that, I would have never booked these tickets because it came out to be more than other options. The booking in the kayak side clearly says Economy and has a link to the inormation for Lufthansa which states Economy included a checked bag. Super annoyed about that.

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

It was good although we could not land in Munich due to weather and we had to go to Stuttgart. Missed our second flight. They did get us on another flight but the seats where not the ones I paid for in the flight that we missed.

Very nice. Crew was excellent and our seats had great legroom which we paid extra for so I highly recommend this option when flying internationally.

In this flight was no good it was delay, change of door

Check in was great. Boarding seemed less organized. Flight was good.

My flight was canceled. New flight is 40 hours later and I still didn’t get the flight from Frankfurt to Zagreb.

Meals were nice are abundant, the staff on both flights were personable and well trained

Budget airline feeling. Bad food, no drinks stingy to give even water

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

Information on your arrival and departure airports