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$391+ 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 2/15. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BIO
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
1 adult, Economy
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Cheap 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 27, 2026.

This FlightHub deal was found by Cheapflights users on 1/26. 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 9/225:40 pm
PHL
-
BIO
1 stop17h 30m
Lufthansa
Tue 10/136:50 am
BIO
-
PHL
1 stop15h 15m
Lufthansa
Deal found 1/26$484
This Justfly.com deal was found by Cheapflights users on 1/26. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/225:40 pm
PHL
-
BIO
1 stop17h 30m
Multiple Airlines
Tue 10/139:00 pm
BIO
-
PHL
2 stops26h 22m
Multiple Airlines
Deal found 1/26$490
This United Airlines deal was found by Cheapflights users on 1/25. 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 3/1112:10 pm
PHL
-
BIO
2 stops30h 10m
United Airlines
Wed 3/1811:35 am
BIO
-
PHL
2 stops27h 12m
United Airlines
Deal found 1/25$502
This American Airlines deal was found by Cheapflights users on 1/26. 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.
Tue 9/221:00 pm
PHL
-
BIO
2 stops17h 45m
American Airlines
Tue 10/139:15 am
BIO
-
PHL
2 stops17h 08m
American Airlines
Deal found 1/26$507
This United Airlines deal was found by Cheapflights users on 1/26. 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 3/410:06 am
PHL
-
BIO
2 stops25h 59m
United Airlines
Sun 3/86:45 am
BIO
-
PHL
1 stop15h 20m
United Airlines
Deal found 1/26$528
This Iberia deal was found by Cheapflights users on 1/26. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/298:30 pm
PHL
-
BIO
1 stop10h 15m
Iberia
Wed 5/139:35 pm
BIO
-
PHL
1 stop25h 55m
Iberia
Deal found 1/26$533
This Delta deal was found by Cheapflights users on 1/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/299:25 am
PHL
-
BIO
2 stops18h 25m
Delta
Wed 5/1310:30 am
BIO
-
PHL
2 stops16h 43m
Delta
Deal found 1/26$573
This Justfly.com deal was found by Cheapflights users on 1/26. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/293:30 pm
PHL
-
BIO
2 stops20h 25m
Multiple Airlines
Wed 5/136:50 am
BIO
-
PHL
1 stop15h 15m
Multiple Airlines
Deal found 1/26$601
This Delta deal was found by Cheapflights users on 1/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/711:27 am
PHL
-
BIO
2 stops23h 53m
Delta
Sat 2/146:50 am
BIO
-
PHL
2 stops19h 52m
Delta
Deal found 1/26$637
This United Airlines deal was found by Cheapflights users on 1/25. 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.
Sat 2/710:10 am
PHL
-
BIO
2 stops25h 55m
United Airlines
Sat 2/1412:50 pm
BIO
-
PHL
2 stops31h 20m
United Airlines
Deal found 1/25$688
This Iberia deal was found by Cheapflights users on 1/26. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/298:30 pm
PHL
-
BIO
1 stop10h 15m
Iberia
Sat 6/69:35 pm
BIO
-
PHL
1 stop25h 55m
Iberia
Deal found 1/26$758

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 January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$502
(United Airlines)

One-way from

$391
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$895
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. 15% potential increase in price ($156 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
Average for round-trip flights in January 2026
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 January 27, 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

Wed 3/11

12:10 pm-11:20 pm

2 stops30h 10m

Bilbao

Wed 3/18

11:35 am-9:47 am

2 stops27h 12m

$502

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Wed 3/4

3:05 pm-10:50 am

2 stops13h 45m

Bilbao

Sun 3/8

6:45 am-4:05 pm

1 stop15h 20m

$528

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Sat 2/7

11:27 am-5:20 pm

2 stops23h 53m

Bilbao

Sat 2/14

6:50 am-8:42 pm

2 stops19h 52m

$637

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Sat 2/7

10:10 am-6:05 pm

2 stops25h 55m

Bilbao

Sat 2/14

12:50 pm-2:10 pm

2 stops31h 20m

$688

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Wed 3/4

7:45 pm-4:55 pm

1 stop15h 10m

Bilbao

Sun 3/8

9:15 am-4:55 pm

1 stop12h 40m

$770

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Wed 3/4

3:30 pm-4:10 pm

2 stops18h 40m

Bilbao

Sun 3/8

12:45 pm-2:47 pm

2 stops55h 02m

$876

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Sat 3/7

12:16 pm-11:20 am

2 stops17h 04m

Bilbao

Thu 3/12

11:55 am-11:00 pm

2 stops16h 05m

$884

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Sun 2/15

9:39 am-8:20 am

2 stops40h 41m

$391

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Sun 2/15

7:45 pm-8:50 pm

1 stop19h 05m

$430

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Mon 5/25

8:25 pm-11:55 am

2 stops33h 30m

$512

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/25

Showing 1-10 of 13 results
1
2

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*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Philadelphia-Bilbao flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 27, 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
3,098 reviews

Crew

7.7

Food

6.4

Entertainment

6.6

Overall

7.0

Boarding

7.2

Comfort

6.8

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
3,098 reviews
Iberia
7.0
Good
3,098 reviews

Crew

7.7

Food

6.4

Entertainment

6.6

Overall

7.0

Boarding

7.2

Comfort

6.8

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
7,749 reviews
Iberia
7.0
Good
3,098 reviews

Crew

7.7

Food

6.4

Entertainment

6.6

Overall

7.0

Boarding

7.2

Comfort

6.8

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 23h 53m. Fly via United Airlines or Delta 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 $664, Iberia will fly you from Philadelphia to Bilbao and back. In addition to Iberia, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Lufthansa for as low as $673. Iberia is priced at 23% 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$664Average$1,009FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$673Average$911FlexibilityNo cancel feeOn-time76%

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