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$461+ 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 1/14. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — BIO
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
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 4, 2025.

This KAYAK deal was found by Cheapflights users on 12/3. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/141:10 pmPHL - BIO
2 stops26h 00mSWISS
Mon 1/198:00 amBIO - PHL
2 stops43h 36mSWISS
Deal found 12/3$461
This Finnair deal was found by Cheapflights users on 12/3. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/79:20 pmPHL - BIO
2 stops19h 55mFinnair
Fri 1/166:45 amBIO - PHL
1 stop14h 55mFinnair
Deal found 12/3$472
This Finnair deal was found by Cheapflights users on 12/2. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/79:20 pmPHL - BIO
2 stops19h 55mMultiple Airlines
Fri 1/166:45 amBIO - PHL
2 stops18h 53mMultiple Airlines
Deal found 12/2$482
This Delta deal was found by Cheapflights users on 12/1. 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.
Fri 1/3011:22 amPHL - BIO
2 stops23h 58mDelta
Tue 2/37:25 amBIO - PHL
2 stops33h 17mDelta
Deal found 12/1$520
This Iberia deal was found by Cheapflights users on 12/3. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/78:30 pmPHL - BIO
1 stop20h 45mIberia
Mon 4/139:35 pmBIO - PHL
1 stop25h 40mIberia
Deal found 12/3$520
This United Airlines deal was found by Cheapflights users on 12/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/175:00 pmPHL - BIO
2 stops43h 05mUnited Airlines
Sat 1/2412:50 pmBIO - PHL
1 stop33h 15mUnited Airlines
Deal found 12/3$524
This United Airlines deal was found by Cheapflights users on 12/2. 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.
Fri 1/910:30 amPHL - BIO
2 stops30h 50mUnited Airlines
Sun 1/186:45 amBIO - PHL
1 stop15h 20mUnited Airlines
Deal found 12/2$526
This United Airlines deal was found by Cheapflights users on 12/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/711:45 amPHL - BIO
2 stops29h 40mUnited Airlines
Tue 4/146:45 amBIO - PHL
1 stop15h 15mUnited Airlines
Deal found 12/3$535

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 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$461
(KAYAK)

Popular in

June

Cheapest in

February

Average price

$1,065
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
Highest demand for flights based on searches. 15% potential increase in price ($161 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 4, 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

Wed 1/14

1:10 pm-9:10 pm

2 stops26h 00m

Bilbao

Mon 1/19

8:00 am-9:36 pm

2 stops43h 36m

$461

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Wed 1/7

9:20 pm-11:15 pm

2 stops19h 55m

Bilbao

Fri 1/16

6:45 am-3:40 pm

1 stop14h 55m

$472

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Wed 1/7

9:20 pm-11:15 pm

2 stops19h 55m

Bilbao

Fri 1/16

6:45 am-7:38 pm

2 stops18h 53m

$482

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Fri 1/30

11:22 am-5:20 pm

2 stops23h 58m

Bilbao

Tue 2/3

7:25 am-10:42 am

2 stops33h 17m

$520

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Tue 4/7

8:30 pm-11:15 pm

1 stop20h 45m

Bilbao

Mon 4/13

9:35 pm-5:15 pm

1 stop25h 40m

$520

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Sat 1/17

5:00 pm-6:05 pm

2 stops43h 05m

Bilbao

Sat 1/24

12:50 pm-4:05 pm

1 stop33h 15m

$524

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Fri 1/9

10:30 am-11:20 pm

2 stops30h 50m

Bilbao

Sun 1/18

6:45 am-4:05 pm

1 stop15h 20m

$526

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Tue 4/7

11:45 am-11:25 pm

2 stops29h 40m

Bilbao

Tue 4/14

6:45 am-4:00 pm

1 stop15h 15m

$535

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Fri 5/22

3:15 pm-5:35 pm

2 stops20h 20m

$571

PhiladelphiaBilbao

PHL - BIO

PHLBIO

Philadelphia

Fri 5/22

3:15 pm-8:15 pm

3 stops23h 00m

$573

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/3

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 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 4, 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 4, 2025.
See what other customers who have flown with United Airlines, 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.
United Airlines
7.4
Good
9,066 reviews

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
United Airlines
7.4
Good
9,066 reviews
United Airlines
7.4
Good
9,066 reviews

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
Iberia
7.0
Good
3,040 reviews
United Airlines
7.4
Good
9,066 reviews

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.
Lufthansa
6.8
Okay
7,612 reviews
United Airlines
7.4
Good
9,066 reviews

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

Food

6.6

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Sunderesh,Dec 2025

AUS - EWR

Smooth flight from Austin to Newark. The crew was friendly.

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 19h 55m. Fly via SWISS, Finnair, 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 $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. Search Cheapflights for deals from United Airlines and Iberia - these airlines can fly you to your destination from $685 and $710, respectively. 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

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Philadelphia to Bilbao

Discover the top 3 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 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$673Average$921FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$685Average$1,065FlexibilityNo cancel feeOn-time69%
IberiaCheapest$710Average$1,021FlexibilityNo cancel feeOn-time77%

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