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$349+ Cheap flights from Philadelphia (PHL) to Bilbao (BIO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/4. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BIO
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Philadelphia to Bilbao

Best flights from Philadelphia to Bilbao
Discover carefully curated flight deals from Philadelphia to Bilbao that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 18, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 12/16. 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 4/75:35 pmPHL - BIO
1 stop13h 45mLufthansa
Mon 4/136:35 pmBIO - PHL
2 stops27h 25mLufthansa
Deal found 12/16$551
This KLM deal was found by Cheapflights users on 12/16. 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 1/75:32 pmPHL - BIO
2 stops16h 58mKLM
Fri 1/166:50 amBIO - PHL
2 stops18h 51mKLM
Deal found 12/16$567
This Air France deal was found by Cheapflights users on 12/16. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/72:00 pmPHL - BIO
2 stops21h 20mAir France
Sat 2/147:25 amBIO - PHL
2 stops17h 58mAir France
Deal found 12/16$591
This American Airlines deal was found by Cheapflights users on 12/16. 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.
Fri 1/91:49 pmPHL - BIO
2 stops12h 41mAmerican Airlines
Sun 1/189:15 amBIO - PHL
1 stop12h 25mAmerican Airlines
Deal found 12/16$596
This Cheapflightsfares deal was found by Cheapflights users on 12/16. 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 3/315:35 pmPHL - BIO
1 stop17h 35mLufthansa
Mon 4/66:35 pmBIO - PHL
2 stops27h 25mLufthansa
Deal found 12/16$551

Find 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 December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$551
(Cheapflightsfares)

One-way from

$349
(Kiwi.com)

Popular in

June

Cheapest in

February
Provider with most accurate pricing for Philadelphia-Bilbao flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-Bilbao flights.
Search Deals
From Philadelphia to Bilbao
Search Deals
One-way flight from Philadelphia to Bilbao
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($164 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($36 potential savings vs. average RT price).
Search Deals

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 December 18, 2025.
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

Tue 4/7

5:35 pm-1:20 pm

1 stop13h 45m

Bilbao

Mon 4/13

6:35 pm-4:00 pm

2 stops27h 25m

$551

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Tue 3/31

5:35 pm-5:10 pm

1 stop17h 35m

Bilbao

Mon 4/6

6:35 pm-4:00 pm

2 stops27h 25m

$551

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Wed 1/7

5:32 pm-4:30 pm

2 stops16h 58m

Bilbao

Fri 1/16

6:50 am-7:41 pm

2 stops18h 51m

$567

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Sat 2/7

2:00 pm-5:20 pm

2 stops21h 20m

Bilbao

Sat 2/14

7:25 am-7:23 pm

2 stops17h 58m

$591

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Fri 1/9

1:49 pm-8:30 am

2 stops12h 41m

Bilbao

Sun 1/18

9:15 am-3:40 pm

1 stop12h 25m

$596

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Mon 5/4

8:30 pm-3:50 pm

2 stops37h 20m

$349

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Mon 5/4

8:30 pm-5:30 pm

1 stop15h 00m

$375

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Fri 5/22

8:30 pm-4:55 pm

1 stop14h 25m

$1,973

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Fri 5/22

6:50 pm-5:30 pm

1 stop16h 40m

$4,902

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

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 December.
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, May is the cheapest month in which you can book a flight from Philadelphia to Bilbao (average of $72). Flying from Philadelphia to Bilbao in August is currently the most expensive (average of $635). 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.

What is the cheapest time of day to fly from PHL to BIO?

Find hourly flight availability from Philadelphia to Bilbao. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 29% on flights from Philadelphia to Bilbao by exploring options for tickets in the evening.

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 December 18, 2025.
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
3,053 reviews

Comfort

6.7

Boarding

7.1

Food

6.3

Overall

7.0

Entertainment

6.6

Crew

7.7

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
3,053 reviews
Iberia
7.0
Good
3,053 reviews

Comfort

6.7

Boarding

7.1

Food

6.3

Overall

7.0

Entertainment

6.6

Crew

7.7

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
7,635 reviews
Iberia
7.0
Good
3,053 reviews

Comfort

6.7

Boarding

7.1

Food

6.3

Overall

7.0

Entertainment

6.6

Crew

7.7

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 13h 45m. Fly via Lufthansa to get the fastest option. The distance between Philadelphia and Bilbao is about 3622 mi.

  • 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, May is the cheapest month in which you can book a flight from Philadelphia to Bilbao (average of $72). Flying from Philadelphia to Bilbao in August is currently the most expensive (average of $635). 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

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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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$673Average$921FlexibilityNo cancel feeOn-time76%
IberiaCheapest$710Average$1,021FlexibilityNo cancel feeOn-time77%

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