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$435+ Cheap flights from Philadelphia (PHL) to Bilbao (BIO)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/23. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BIO
Feb 5 — Feb 121
Thu 2/5
Thu 2/12
1 adult, Economy
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Cheap flight deals from Philadelphia to Bilbao

Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to Bilbao (BIO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 6, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$435
(Flysmarter)

Popular in

June

Cheapest in

February

Average price

$895
Provider with most accurate pricing for Philadelphia-Bilbao flight deals.
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Provider most trusted by Cheapflights users for Philadelphia-Bilbao flights.
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From Philadelphia to Bilbao
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Highest demand for flights based on searches. 16% potential increase in price ($164 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find flight deals from Philadelphia to Bilbao

Cheapest flights from Philadelphia to Bilbao
Explore the most affordable flight options available from Philadelphia to Bilbao. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 6, 2026.

This Flysmarter deal was found by Cheapflights users on 1/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/237:45 pmPHL - BIO
1 stop11h 05mMultiple Airlines
Wed 3/49:15 amBIO - PHL
1 stop12h 10mMultiple Airlines
Deal found 1/6$435
This Expedia deal was found by Cheapflights users on 1/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/187:45 pmPHL - BIO
1 stop19h 05mIberia
Wed 2/258:55 amBIO - PHL
1 stop12h 10mIberia
Deal found 1/6$439
This American Airlines deal was found by Cheapflights users on 1/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/234:45 pmPHL - BIO
2 stops14h 05mAmerican Airlines
Wed 3/46:45 amBIO - PHL
1 stop14h 40mAmerican Airlines
Deal found 1/6$441
This KLM deal was found by Cheapflights users on 1/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/232:31 pmPHL - BIO
2 stops15h 14mKLM
Wed 3/48:30 amBIO - PHL
2 stops16h 22mKLM
Deal found 1/6$447
This Mytrip deal was found by Cheapflights users on 1/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/183:30 pmPHL - BIO
2 stops20h 35mMultiple Airlines
Wed 2/2512:50 pmBIO - PHL
2 stops15h 56mMultiple Airlines
Deal found 1/4$455
This KLM deal was found by Cheapflights users on 1/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/1812:16 pmPHL - BIO
2 stops17h 29mKLM
Wed 2/258:30 amBIO - PHL
2 stops16h 22mKLM
Deal found 1/6$457
This Cheapflightsfares deal was found by Cheapflights users on 1/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/215:35 pmPHL - BIO
1 stop13h 45mLufthansa
Thu 4/306:50 amBIO - PHL
1 stop15h 10mLufthansa
Deal found 1/3$468
This FlightHub deal was found by Cheapflights users on 1/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/213:30 pmPHL - BIO
2 stops20h 25mMultiple Airlines
Thu 4/306:50 amBIO - PHL
1 stop15h 10mMultiple Airlines
Deal found 1/5$477
This United Airlines deal was found by Cheapflights users on 1/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/231:00 pmPHL - BIO
2 stops16h 10mUnited Airlines
Wed 9/306:50 amBIO - PHL
1 stop15h 10mUnited Airlines
Deal found 1/4$478
This United Airlines deal was found by Cheapflights users on 1/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/1810:35 amPHL - BIO
2 stops18h 15mUnited Airlines
Wed 2/2512:50 pmBIO - PHL
2 stops32h 34mUnited Airlines
Deal found 1/4$486

Cheapflights Fare Finder

 
Customize your flight search to find flights from Philadelphia to Bilbao that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 6, 2026.
Use the filters below to find and compare flights from Philadelphia to Bilbao that are best for you.

Fly from

Philadelphia

Fly to

Bilbao

Route

Depart

Return

Price

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Mon 2/23

7:45 pm-12:50 pm

1 stop11h 05m

Bilbao

Wed 3/4

9:15 am-3:25 pm

1 stop12h 10m

$435

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Wed 2/18

7:45 pm-8:50 pm

1 stop19h 05m

Bilbao

Wed 2/25

8:55 am-3:05 pm

1 stop12h 10m

$439

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Mon 2/23

4:45 pm-12:50 pm

2 stops14h 05m

Bilbao

Wed 3/4

6:45 am-3:25 pm

1 stop14h 40m

$441

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Tue 2/3

7:55 pm-8:50 pm

1 stop18h 55m

Bilbao

Tue 2/10

6:45 am-3:40 pm

1 stop14h 55m

$442

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Mon 2/23

2:31 pm-11:45 am

2 stops15h 14m

Bilbao

Wed 3/4

8:30 am-6:52 pm

2 stops16h 22m

$447

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Wed 2/18

3:30 pm-6:05 pm

2 stops20h 35m

Bilbao

Wed 2/25

12:50 pm-10:46 pm

2 stops15h 56m

$455

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Wed 2/18

12:16 pm-11:45 am

2 stops17h 29m

Bilbao

Wed 2/25

8:30 am-6:52 pm

2 stops16h 22m

$457

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Wed 2/18

10:35 am-10:50 am

2 stops18h 15m

Bilbao

Wed 2/25

12:50 pm-3:24 pm

2 stops32h 34m

$486

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Fri 5/22

6:50 pm-8:50 pm

2 stops20h 00m

$5,488

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Fri 5/22

5:35 pm-1:00 pm

1 stop13h 25m

$5,920

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/6

Compare providers for flights from Philadelphia to Bilbao

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Philadelphia to Bilbao in January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Philadelphia-Bilbao flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Philadelphia-Bilbao flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Philadelphia-Bilbao flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Philadelphia-Bilbao flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Philadelphia-Bilbao flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Philadelphia to Bilbao

Have a flexible travel schedule? Discover the best time to fly to Bilbao from Philadelphia with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Philadelphia to Bilbao?

Currently, October is the cheapest month in which you can book a flight from Philadelphia to Bilbao (average of $361). Flying from Philadelphia to Bilbao in June is currently the most expensive (average of $733). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Bilbao

Get insights into the airlines that provide service to Bilbao. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Bilbao. Reviews last updated January 6, 2026.
See what other customers who have flown with Iberia and Lufthansa from Philadelphia to Bilbao have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Iberia
7.0
Good
3,073 reviews

Crew

7.7

Food

6.3

Boarding

7.1

Entertainment

6.6

Comfort

6.7

Overall

7.0

Reviews

1 / 20
2.0
Mediocre

Stiphan,Nov 2025

SVQ - MAD

Ground staff in Seville are incompetent. I fly over 300K KM per year and understand rules. Had to waste time to try to get baggage checked through for entire reservation but ground crew insisted I had to claim in Madrid. Once in Madrid, Ground staff said that it should have been checked through and did recheck the baggage. Wasted time and energy. Not level of service expected when flying business class with family and 10 suitcases. And one suitcase got lost.
Iberia
7.0
Good
3,073 reviews
Iberia
7.0
Good
3,073 reviews

Crew

7.7

Food

6.3

Boarding

7.1

Entertainment

6.6

Comfort

6.7

Overall

7.0

Reviews

1 / 20
2.0
Mediocre

Stiphan,Nov 2025

SVQ - MAD

Ground staff in Seville are incompetent. I fly over 300K KM per year and understand rules. Had to waste time to try to get baggage checked through for entire reservation but ground crew insisted I had to claim in Madrid. Once in Madrid, Ground staff said that it should have been checked through and did recheck the baggage. Wasted time and energy. Not level of service expected when flying business class with family and 10 suitcases. And one suitcase got lost.
Lufthansa
6.8
Okay
7,683 reviews
Iberia
7.0
Good
3,073 reviews

Crew

7.7

Food

6.3

Boarding

7.1

Entertainment

6.6

Comfort

6.7

Overall

7.0

Reviews

1 / 20
2.0
Mediocre

Stiphan,Nov 2025

SVQ - MAD

Ground staff in Seville are incompetent. I fly over 300K KM per year and understand rules. Had to waste time to try to get baggage checked through for entire reservation but ground crew insisted I had to claim in Madrid. Once in Madrid, Ground staff said that it should have been checked through and did recheck the baggage. Wasted time and energy. Not level of service expected when flying business class with family and 10 suitcases. And one suitcase got lost.

Related info for your journey

Find useful and relevant information for your journey from Philadelphia to Bilbao. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Philadelphia to Bilbao?

    There are many flights that can get you from Philadelphia to Bilbao in 14h 05m. Fly via Iberia or American Airlines to get the fastest option. The distance between Philadelphia and Bilbao is about 3622 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Philadelphia to Bilbao round-trip?

    Currently priced at $673, Lufthansa will fly you from Philadelphia to Bilbao and back. In addition to Lufthansa, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Iberia for as low as $710. Lufthansa is priced at 22% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Philadelphia to Bilbao that include hotel bookings?

    Yes. In addition to deals on Philadelphia to Bilbao flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Philadelphia to Bilbao?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Philadelphia to Bilbao.

  • Can I find deals for business class flights from Philadelphia to Bilbao?

    Yes. Cheapflights offers flight deals from Philadelphia to Bilbao by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Philadelphia to Bilbao?

    Currently, October is the cheapest month in which you can book a flight from Philadelphia to Bilbao (average of $361). Flying from Philadelphia to Bilbao in June is currently the most expensive (average of $733). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Philadelphia to Bilbao

Discover the top 2 airlines that operate flights from Philadelphia to Bilbao. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$673Average$921FlexibilityNo cancel feeOn-time76%
IberiaCheapest$710Average$1,021FlexibilityNo cancel feeOn-time77%

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