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Basel

$312+ 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 10/17. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BSL
Aug 10 — Aug 171
Sun 8/10
Sun 8/17
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 August 5, 2025.

Round-trip from

$450
(Expedia)

One-way from

$369
(Lufthansa)

Popular in

June

Cheapest in

February

Average price

$632
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. 10% potential increase in price ($73 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in August 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 August 5, 2025.

This Expedia deal was found by Cheapflights users on 8/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/297:50 pmSEA - BSL
1 stop18h 15mBritish Airways
Mon 11/104:00 pmBSL - SEA
1 stop28h 30mBritish Airways
Deal found 8/4$450
This Delta deal was found by Cheapflights users on 8/4. 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 8/185:40 pmSEA - BSL
1 stop15h 10mDelta
Tue 8/266:15 amBSL - SEA
1 stop18h 40mDelta
Deal found 8/4$480
This Expedia deal was found by Cheapflights users on 8/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/157:44 amSEA - BSL
2 stops18h 36mBritish Airways
Wed 10/2911:10 amBSL - SEA
1 stop14h 45mBritish Airways
Deal found 8/4$485
This British Airways deal was found by Cheapflights users on 8/3. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/187:25 pmPDX - BSL
1 stop18h 25mBritish Airways
Tue 8/266:45 amBSL - PDX
2 stops21h 07mBritish Airways
Deal found 8/3$492
This Ovago deal was found by Cheapflights users on 8/5. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/86:50 pmSEA - BSL
1 stop30h 25mBritish Airways
Fri 12/267:00 amBSL - SEA
1 stop18h 55mBritish Airways
Deal found 8/5$500
This Ovago deal was found by Cheapflights users on 8/4. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/93:00 pmSEA - BSL
2 stops18h 30mBritish Airways
Wed 9/246:40 amBSL - SEA
2 stops19h 49mBritish Airways
Deal found 8/4$515
This Delta deal was found by Cheapflights users on 8/4. 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.
Sun 8/171:30 pmSEA - BSL
1 stop14h 40mDelta
Sun 8/246:15 amBSL - SEA
1 stop18h 40mDelta
Deal found 8/4$517
This Delta deal was found by Cheapflights users on 8/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/191:55 pmSEA - BSL
1 stop34h 55mDelta
Sun 11/2311:15 amBSL - SEA
1 stop33h 35mDelta
Deal found 8/3$518
This American Airlines deal was found by Cheapflights users on 8/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/187:40 amPDX - BSL
2 stops18h 20mMultiple Airlines
Tue 8/266:45 amBSL - PDX
2 stops20h 53mMultiple Airlines
Deal found 8/3$520
This Delta deal was found by Cheapflights users on 8/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1810:05 pmPDX - BSL
2 stops26h 25mDelta
Tue 8/2610:10 amBSL - PDX
2 stops33h 24mDelta
Deal found 8/3$528
This American Airlines deal was found by Cheapflights users on 8/3. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/187:25 pmPDX - BSL
1 stop18h 25mAmerican Airlines
Tue 8/266:45 amBSL - PDX
1 stop19h 50mAmerican Airlines
Deal found 8/3$590
This United Airlines deal was found by Cheapflights users on 8/5. 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.
Thu 12/117:00 amPDX - BSL
3 stops20h 25mUnited Airlines
Mon 12/221:05 pmBSL - PDX
2 stops42h 41mUnited Airlines
Deal found 8/5$686

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 August 5, 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

Wed 10/29

7:50 pm-10:05 pm

1 stop18h 15m

Basel EuroAirport Swiss

Mon 11/10

4:00 pm-11:30 am

1 stop28h 30m

$450

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Mon 8/18

5:40 pm-5:50 pm

1 stop15h 10m

Basel EuroAirport Swiss

Tue 8/26

6:15 am-3:55 pm

1 stop18h 40m

$480

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 10/15

7:44 am-11:20 am

2 stops18h 36m

Basel EuroAirport Swiss

Wed 10/29

11:10 am-5:55 pm

1 stop14h 45m

$485

PortlandBasel

PDX - BSL

PDXBSL

Portland

Mon 8/18

7:25 pm-10:50 pm

1 stop18h 25m

Basel EuroAirport Swiss

Tue 8/26

6:45 am-6:52 pm

2 stops21h 07m

$492

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Mon 12/8

6:50 pm-10:15 am

1 stop30h 25m

Basel EuroAirport Swiss

Fri 12/26

7:00 am-4:55 pm

1 stop18h 55m

$500

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 9/9

3:00 pm-6:30 pm

2 stops18h 30m

Basel EuroAirport Swiss

Wed 9/24

6:40 am-5:29 pm

2 stops19h 49m

$515

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 8/17

1:30 pm-1:10 pm

1 stop14h 40m

Basel EuroAirport Swiss

Sun 8/24

6:15 am-3:55 pm

1 stop18h 40m

$517

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 11/19

1:55 pm-9:50 am

1 stop34h 55m

Basel EuroAirport Swiss

Sun 11/23

11:15 am-11:50 am

1 stop33h 35m

$518

PortlandBasel

PDX - BSL

PDXBSL

Portland

Mon 8/18

7:40 am-11:00 am

2 stops18h 20m

Basel EuroAirport Swiss

Tue 8/26

6:45 am-6:38 pm

2 stops20h 53m

$520

PortlandBasel

PDX - BSL

PDXBSL

Portland

Mon 8/18

10:05 pm-9:30 am

2 stops26h 25m

Basel EuroAirport Swiss

Tue 8/26

10:10 am-10:34 am

2 stops33h 24m

$528

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/5

Showing 1-10 of 22 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 August 5, 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.

How much does it cost to fly round-trip from State of Washington to Basel EuroAirport Swiss?

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 August 5, 2025.
Read through reviews of airlines operating flights from Washington to Basel EuroAirport Swiss, such as Delta, KLM, and Air France. 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
7,985 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

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
7,985 reviews
Delta
8.0
Very good
7,985 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

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
1,381 reviews
Delta
8.0
Very good
7,985 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

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!
Air France
7.5
Good
1,466 reviews
Delta
8.0
Very good
7,985 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

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
8,916 reviews
Delta
8.0
Very good
7,985 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

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!
Turkish Airlines
7.3
Good
3,934 reviews
Delta
8.0
Very good
7,985 reviews

Comfort

7.9

Entertainment

7.9

Overall

8.0

Crew

8.5

Boarding

8.2

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 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 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 August 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$443Average$694FlexibilityNo cancel feeOn-time70%
DeltaCheapest$513Average$741FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$571Average$623FlexibilityNo cancel feeOn-time76%

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