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$329+ 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 7/12. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BIO
Jul 5 — Jul 121
Sat 7/5
Sat 7/12
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 June 30, 2025.

Round-trip from

$532
(American Airlines)

One-way from

$329
(Kiwi.com)

Popular in

November

Cheapest in

January

Average price

$1,185
From Philadelphia to Bilbao
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One-way flight from Philadelphia to Bilbao
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Highest demand for flights based on searches. 11% potential increase in price ($111 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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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 June 30, 2025.

This American Airlines deal was found by Cheapflights users on 6/27. 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.
Sun 8/178:25 pmPHL - BIO
1 stop10h 20mAmerican Airlines
Mon 8/251:30 pmBIO - PHL
1 stop32h 20mAmerican Airlines
Deal found 6/27$532
This Lufthansa deal was found by Cheapflights users on 6/28. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/185:35 pmPHL - BIO
1 stop19h 10mLufthansa
Mon 8/257:10 pmBIO - PHL
1 stop26h 50mLufthansa
Deal found 6/28$547
This United Airlines deal was found by Cheapflights users on 6/29. 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 10/16:30 amPHL - BIO
2 stops29h 50mUnited Airlines
Sat 10/256:45 amBIO - PHL
2 stops20h 53mUnited Airlines
Deal found 6/29$551
This Delta deal was found by Cheapflights users on 6/28. 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.
Mon 8/188:00 amPHL - BIO
2 stops21h 15mDelta
Mon 8/2512:00 pmBIO - PHL
2 stops51h 59mDelta
Deal found 6/28$555
This Iberia deal was found by Cheapflights users on 6/30. 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.
Thu 9/118:25 pmPHL - BIO
1 stop18h 25mIberia
Mon 9/229:35 pmBIO - PHL
1 stop24h 20mIberia
Deal found 6/30$591
This KLM deal was found by Cheapflights users on 6/28. 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.
Fri 8/14:05 pmPHL - BIO
2 stops13h 50mKLM
Fri 8/227:10 amBIO - PHL
2 stops17h 11mKLM
Deal found 6/28$598
This Air France deal was found by Cheapflights users on 6/30. 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.
Tue 7/112:52 pmPHL - BIO
2 stops15h 33mMultiple Airlines
Tue 7/812:00 pmBIO - PHL
2 stops15h 34mMultiple Airlines
Deal found 6/30$690
This Gurufare deal was found by Cheapflights users on 6/29. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/16:50 pmPHL - BIO
1 stop16h 40mAer Lingus
Sat 10/256:10 pmBIO - PHL
1 stop28h 50mAer Lingus
Deal found 6/29$741

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 June 30, 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

Sun 8/17

8:25 pm-12:45 pm

1 stop10h 20m

Bilbao

Mon 8/25

1:30 pm-3:50 pm

1 stop32h 20m

$532

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Mon 8/18

5:35 pm-6:45 pm

1 stop19h 10m

Bilbao

Mon 8/25

7:10 pm-4:00 pm

1 stop26h 50m

$547

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Wed 10/1

6:30 am-6:20 pm

2 stops29h 50m

Bilbao

Sat 10/25

6:45 am-9:38 pm

2 stops20h 53m

$551

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Mon 8/18

8:00 am-11:15 am

2 stops21h 15m

Bilbao

Mon 8/25

12:00 pm-9:59 am

2 stops51h 59m

$555

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Thu 9/11

8:25 pm-8:50 pm

1 stop18h 25m

Bilbao

Mon 9/22

9:35 pm-3:55 pm

1 stop24h 20m

$591

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Fri 8/1

4:05 pm-11:55 am

2 stops13h 50m

Bilbao

Fri 8/22

7:10 am-6:21 pm

2 stops17h 11m

$598

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Thu 8/14

5:35 pm-1:20 pm

1 stop13h 45m

Bilbao

Thu 8/21

6:45 am-10:07 pm

2 stops21h 22m

$724

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Wed 10/1

6:50 pm-5:30 pm

1 stop16h 40m

Bilbao

Sat 10/25

6:10 pm-5:00 pm

1 stop28h 50m

$741

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Sat 7/12

7:05 pm-8:25 am

3 stops55h 20m

$329

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Wed 10/15

3:00 pm-11:25 pm

2 stops26h 25m

$460

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/28

Showing 1-10 of 16 results
1
2

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, January is the cheapest month in which you can book a flight from Philadelphia to Bilbao (average of $541). Flying from Philadelphia to Bilbao in June is currently the most expensive (average of $1,149). 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 June 30, 2025.

Unlike in the morning, 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 afternoon.

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 June 30, 2025.
See what other customers who have flown with Delta, KLM, and SWISS 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.
Delta
8.0
Very good
7,969 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,969 reviews
Delta
8.0
Very good
7,969 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,366 reviews
Delta
8.0
Very good
7,969 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,653 reviews
Delta
8.0
Very good
7,969 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,852 reviews
Delta
8.0
Very good
7,969 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,969 reviews

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

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

    Currently priced at $532, American Airlines will fly you from Philadelphia to Bilbao and back. In addition to American Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Lufthansa and Delta - these airlines can fly you to your destination from $547 and $555, respectively. American Airlines is priced at 41% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Philadelphia to Bilbao one-way?

    To fly one-way, consider booking your trip with Lufthansa, which is currently one of the cheapest options available, starting at $528. American Airlines flights start at $559 while deals on Iberia start at $563 one-way.

  • 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, January is the cheapest month in which you can book a flight from Philadelphia to Bilbao (average of $541). Flying from Philadelphia to Bilbao in June is currently the most expensive (average of $1,149). 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 June 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
IberiaCheapest$496Average$1,021FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$587Average$937FlexibilityNo cancel feeOn-time76%

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