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$421+ Cheap flights from Washington to Basel EuroAirport Swiss (BSL)

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 5/11. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BSL
Apr 29 — May 61
Tue 4/29
Tue 5/6
1 adult, Economy
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Cheap flight deals from Washington to Basel

Keep the following information in mind while searching for Washington to Basel flight deals. Data was last updated April 24, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$590
(American Airlines)

One-way from

$421
(Air France)

Popular in

June

Cheapest in

January

Average price

$689
Provider with most accurate pricing for Seattle/Tacoma Intl-Basel (EAP) flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Basel (EAP) flights.
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From Washington to Basel EuroAirport Swiss
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One-way flight from Washington to Basel EuroAirport Swiss
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Highest demand for flights based on searches. 28% potential increase in price ($290 potential increase over avg. RT price).
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Cheapest flight prices on average. 9% potential price decrease ($63 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from Washington to Basel

Cheapest flights from Washington to Basel
Explore the most affordable flight options available from Washington to Basel. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 24, 2025.

This American Airlines deal was found by Cheapflights users on 4/23. 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 9/18:20 pmSEA - BSL
1 stop13h 00mMultiple Airlines
Mon 9/157:20 pmBSL - SEA
1 stop24h 50mMultiple Airlines
Deal found 4/23$590
This United Airlines deal was found by Cheapflights users on 4/23. 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.
Mon 9/17:00 amSEA - BSL
2 stops18h 50mUnited Airlines
Mon 9/1511:30 amBSL - SEA
2 stops35h 46mUnited Airlines
Deal found 4/23$619
This Gurufare deal was found by Cheapflights users on 4/23. 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.
Mon 9/18:20 pmSEA - BSL
1 stop13h 00mBritish Airways
Mon 9/157:20 pmBSL - SEA
2 stops33h 44mBritish Airways
Deal found 4/23$624
This Lufthansa deal was found by Cheapflights users on 4/23. 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.
Sat 8/162:20 pmSEA - BSL
1 stop18h 30mLufthansa
Sun 8/241:00 pmBSL - SEA
1 stop12h 59mLufthansa
Deal found 4/23$658
This Delta deal was found by Cheapflights users on 4/23. 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 8/166:05 amSEA - BSL
2 stops18h 30mDelta
Sun 8/246:15 amBSL - SEA
1 stop14h 20mDelta
Deal found 4/23$662
This Delta deal was found by Cheapflights users on 4/21. 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 8/46:30 amPSC - BSL
2 stops22h 40mDelta
Mon 8/252:25 pmBSL - PSC
2 stops34h 54mDelta
Deal found 4/21$664
This KLM deal was found by Cheapflights users on 4/22. 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 8/15:00 pmPSC - BSL
2 stops15h 50mKLM
Thu 8/2810:15 amBSL - PSC
2 stops18h 31mKLM
Deal found 4/22$806
This American Airlines deal was found by Cheapflights users on 4/23. 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 6/68:20 pmSEA - BSL
1 stop12h 20mAmerican Airlines
Fri 6/136:00 amBSL - SEA
1 stop14h 35mAmerican Airlines
Deal found 4/23$924
This American Airlines deal was found by Cheapflights users on 4/23. 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.
Thu 6/57:25 pmPDX - BSL
1 stop18h 25mAmerican Airlines
Tue 6/1011:10 amBSL - PDX
1 stop15h 25mAmerican Airlines
Deal found 4/23$1,065
This Air Canada deal was found by Cheapflights users on 4/23. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/53:25 pmPDX - BSL
2 stops19h 10mMultiple Airlines
Tue 6/108:30 amBSL - PDX
2 stops33h 50mMultiple Airlines
Deal found 4/23$1,067
This Austrian Airlines deal was found by Cheapflights users on 4/23. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/58:00 amSEA - BSL
2 stops40h 40mAustrian Airlines
Thu 6/1210:20 amBSL - SEA
2 stops41h 33mAustrian Airlines
Deal found 4/23$1,283
This United Airlines deal was found by Cheapflights users on 4/21. 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 8/55:30 amPSC - BSL
3 stops20h 20mUnited Airlines
Thu 8/281:00 pmBSL - PSC
2 stops19h 08mUnited Airlines
Deal found 4/21$1,318

Cheapflights Fare Finder

Customize your flight search to find flights from Washington to Basel 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 April 24, 2025.
Use the filters below to find and compare flights from Washington to Basel EuroAirport Swiss that are best for you.

Fly from

Washington

Fly to

Basel

Route

Depart

Return

Price

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Mon 9/1

8:20 pm-6:20 pm

1 stop13h 00m

Basel EuroAirport Swiss

Mon 9/15

7:20 pm-11:10 am

1 stop24h 50m

$590

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Mon 9/1

7:00 am-10:50 am

2 stops18h 50m

Basel EuroAirport Swiss

Mon 9/15

11:30 am-2:16 pm

2 stops35h 46m

$619

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Mon 9/1

8:20 pm-6:20 pm

1 stop13h 00m

Basel EuroAirport Swiss

Mon 9/15

7:20 pm-8:04 pm

2 stops33h 44m

$624

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sat 8/16

2:20 pm-5:50 pm

1 stop18h 30m

Basel EuroAirport Swiss

Sun 8/24

1:00 pm-4:59 pm

1 stop12h 59m

$658

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sat 8/16

6:05 am-9:35 am

2 stops18h 30m

Basel EuroAirport Swiss

Sun 8/24

6:15 am-11:35 am

1 stop14h 20m

$662

PascoBasel

PSC - BSL

PSCBSL

Pasco Tri Cities

Mon 8/4

6:30 am-2:10 pm

2 stops22h 40m

Basel EuroAirport Swiss

Mon 8/25

2:25 pm-4:19 pm

2 stops34h 54m

$664

PascoBasel

PSC - BSL

PSCBSL

Pasco Tri Cities

Fri 8/1

5:00 pm-5:50 pm

2 stops15h 50m

Basel EuroAirport Swiss

Thu 8/28

10:15 am-7:46 pm

2 stops18h 31m

$806

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Fri 6/6

8:20 pm-5:40 pm

1 stop12h 20m

Basel EuroAirport Swiss

Fri 6/13

6:00 am-11:35 am

1 stop14h 35m

$924

PortlandBasel

PDX - BSL

PDXBSL

Portland

Thu 6/5

7:25 pm-10:50 pm

1 stop18h 25m

Basel EuroAirport Swiss

Tue 6/10

11:10 am-5:35 pm

1 stop15h 25m

$1,065

PortlandBasel

PDX - BSL

PDXBSL

Portland

Thu 6/5

3:25 pm-7:35 pm

2 stops19h 10m

Basel EuroAirport Swiss

Tue 6/10

8:30 am-9:20 am

2 stops33h 50m

$1,067

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

Showing 1-10 of 21 results
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Best time to book a flight from Washington to Basel

Have a flexible travel schedule? Discover the best time to fly to Basel from Washington 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 Washington to Basel EuroAirport Swiss

What is the cheapest month to book a flight from State of Washington to Basel EuroAirport Swiss?

Currently, January is the cheapest month in which you can book a flight from State of Washington to Basel EuroAirport Swiss (average of $545). Flying from State of Washington to Basel EuroAirport Swiss in June is currently the most expensive (average of $1,132). 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 WA to BSL?

Find hourly flight availability from Washington to Basel. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 24, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from State of Washington to Basel EuroAirport Swiss as you normally would.

Rainfall in Basel by month

Plan your trip to Basel by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Basel EuroAirport Swiss ranges from 1.9 - 3.4 inches per month. June is typically the wettest month, when rainfall can reach 3.4 in. February is typically the driest time to visit Basel EuroAirport Swiss when rainfall is around 1.9 in.

Temperature in Basel by month

Plan your trip to Basel by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Basel EuroAirport Swiss, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 F).

Reviews of airlines servicing Basel

Get insights into the airlines that provide service to Basel. 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 Basel. Reviews last updated April 24, 2025.
Get a feel of what it's like to fly with Delta, KLM and Austrian Airlines from Washington to Basel by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,920 reviews

Food

7.3

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,920 reviews
Delta
8.0
Very good
7,920 reviews

Food

7.3

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
7,920 reviews

Food

7.3

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Austrian Airlines
7.6
Good
780 reviews
Delta
8.0
Very good
7,920 reviews

Food

7.3

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air France
7.4
Good
1,442 reviews
Delta
8.0
Very good
7,920 reviews

Food

7.3

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,685 reviews
Delta
8.0
Very good
7,920 reviews

Food

7.3

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

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

  • What airport do you fly into for flights to Basel from Washington?

    Basel EuroAirport Swiss (BSL) is the airport you will fly into if you book a flight from Washington to Basel. It is only a 3.6 mi journey from EuroAirport Swiss (BSL) to Basel’s city center.

  • What are the cheapest airlines to fly from State of Washington to Basel EuroAirport Swiss one-way?

    To fly one-way, consider booking your trip with Air France, which is currently one of the cheapest options available, starting at $421. United Airlines flights start at $425 while deals on Delta start at $427 one-way.

  • What are the most popular routes from State of Washington to Basel EuroAirport Swiss?

    When deciding which route to take from State of Washington to Basel EuroAirport Swiss consider Seattle/Tacoma Intl - Basel EuroAirport Swiss, Portland - Basel EuroAirport Swiss or Pasco Tri Cities - Basel EuroAirport Swiss as they are the most popular.

  • Can I find deals for flights from Washington to Basel that include hotel bookings?

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

  • How can I find direct flights from Washington to Basel?

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

  • Can I find deals for business class flights from Washington to Basel?

    Yes. Cheapflights offers flight deals from Washington to Basel 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 State of Washington to Basel EuroAirport Swiss?

    Currently, January is the cheapest month in which you can book a flight from State of Washington to Basel EuroAirport Swiss (average of $545). Flying from State of Washington to Basel EuroAirport Swiss in June is currently the most expensive (average of $1,132). 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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Alternative routes for Washington to Basel

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Washington to Basel

Discover the top 3 airlines that operate flights from Washington to Basel. 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 April 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$443Average$690FlexibilityNo cancel feeOn-time70%
Air FranceCheapest$502Average$769FlexibilityNo cancel feeOn-time77%
DeltaCheapest$513Average$741FlexibilityNo cancel feeOn-timeN/A

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