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$470+ Cheap flights from Basel EuroAirport Swiss (BSL) to Washington

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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
BSL — SEA
Apr 29 — May 61
Tue 4/29
Tue 5/6
1 adult, Economy
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Cheap flight deals from Basel to Washington

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

Round-trip from

$526
(British Airways)

One-way from

$470
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$471
From Basel EuroAirport Swiss to Washington
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One-way flight from Basel EuroAirport Swiss to Washington
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Highest demand for flights based on searches. 21% potential increase in price ($170 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($35 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 Basel to Washington

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

This British Airways deal was found by Cheapflights users on 4/24. 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.
Fri 5/306:00 amBSL - SEA
1 stop14h 35mBritish Airways
Sat 6/71:35 pmSEA - BSL
1 stop19h 05mBritish Airways
Deal found 4/24$526
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.
Sun 10/57:05 amBSL - SEA
1 stop13h 25mAmerican Airlines
Tue 10/148:20 pmSEA - BSL
1 stop17h 30mAmerican Airlines
Deal found 4/23$552
This Air France 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 France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/3010:15 amBSL - SEA
1 stop14h 45mMultiple Airlines
Thu 5/81:30 pmSEA - BSL
1 stop14h 40mMultiple Airlines
Deal found 4/23$554
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 8/236:15 amBSL - SEA
2 stops21h 11mDelta
Wed 9/247:20 amSEA - BSL
2 stops17h 15mDelta
Deal found 4/23$555
This KLM 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/306:15 amBSL - SEA
1 stop18h 45mKLM
Sat 5/106:07 pmSEA - BSL
1 stop30h 28mKLM
Deal found 4/23$560
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.
Thu 6/269:45 amBSL - SEA
2 stops24h 11mUnited Airlines
Tue 7/112:40 pmSEA - BSL
2 stops21h 55mUnited Airlines
Deal found 4/23$626
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.
Fri 6/66:15 amBSL - PDX
1 stop13h 50mDelta
Wed 6/117:15 amPDX - BSL
2 stops21h 35mDelta
Deal found 4/23$660
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 6/76:05 amBSL - SEA
1 stop15h 20mLufthansa
Sat 6/142:15 pmSEA - BSL
1 stop14h 25mLufthansa
Deal found 4/23$688
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 7/2412:15 pmBSL - PDX
1 stop14h 20mAmerican Airlines
Mon 9/17:25 pmPDX - BSL
1 stop18h 25mAmerican Airlines
Deal found 4/23$721
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 6/611:45 amBSL - PDX
2 stops19h 45mMultiple Airlines
Tue 6/1012:09 amPDX - BSL
2 stops26h 11mMultiple Airlines
Deal found 4/23$996
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.
Mon 4/288:25 amBSL - SEA
2 stops19h 03mAir Canada
Sat 5/1010:00 amSEA - BSL
2 stops15h 55mAir Canada
Deal found 4/23$1,245
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/176:55 pmBSL - SEA
1 stop31h 20mTurkish Airlines
Sat 5/317:10 pmSEA - BSL
1 stop29h 30mTurkish Airlines
Deal found 4/23$5,826

Cheapflights Fare Finder

Customize your flight search to find flights from Basel to Washington 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 Basel EuroAirport Swiss to Washington that are best for you.

Fly from

Basel

Fly to

Washington

Route

Depart

Return

Price

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Fri 5/30

6:00 am-11:35 am

1 stop14h 35m

Seattle/Tacoma Intl

Sat 6/7

1:35 pm-5:40 pm

1 stop19h 05m

$526

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sun 10/5

7:05 am-11:30 am

1 stop13h 25m

Seattle/Tacoma Intl

Tue 10/14

8:20 pm-10:50 pm

1 stop17h 30m

$552

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sat 8/23

6:15 am-6:26 pm

2 stops21h 11m

Seattle/Tacoma Intl

Wed 9/24

7:20 am-9:35 am

2 stops17h 15m

$555

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sun 6/1

6:15 am-11:40 am

1 stop14h 25m

Seattle/Tacoma Intl

Sat 6/7

2:10 pm-1:50 pm

1 stop14h 40m

$561

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 6/26

9:45 am-12:56 am

2 stops24h 11m

Seattle/Tacoma Intl

Tue 7/1

12:40 pm-7:35 pm

2 stops21h 55m

$626

BaselPortland

BSL - PDX

BSLPDX

Basel EuroAirport Swiss

Fri 6/6

6:15 am-11:05 am

1 stop13h 50m

Portland

Wed 6/11

7:15 am-1:50 pm

2 stops21h 35m

$660

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sat 5/17

6:35 am-11:35 am

1 stop14h 00m

Seattle/Tacoma Intl

Sat 5/31

8:20 pm-5:40 pm

1 stop12h 20m

$661

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sat 6/7

6:05 am-12:25 pm

1 stop15h 20m

Seattle/Tacoma Intl

Sat 6/14

2:15 pm-1:40 pm

1 stop14h 25m

$688

BaselPortland

BSL - PDX

BSLPDX

Basel EuroAirport Swiss

Thu 7/24

12:15 pm-5:35 pm

1 stop14h 20m

Portland

Mon 9/1

7:25 pm-10:50 pm

1 stop18h 25m

$721

BaselPortland

BSL - PDX

BSLPDX

Basel EuroAirport Swiss

Fri 6/6

11:45 am-10:30 pm

2 stops19h 45m

Portland

Tue 6/10

12:09 am-11:20 am

2 stops26h 11m

$996

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/23

Showing 1-10 of 14 results
1
2

Best time to book a flight from Basel to Washington

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

Rainfall in Washington by month

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

In terms of precipitation, rainfall in State of Washington ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit State of Washington when rainfall is around 0.7 in.

Temperature in Washington by month

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

If weather is an important factor for your trip to State of Washington, 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 December, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. 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 Washington. Reviews last updated April 24, 2025.
To help decide which airline to fly from Basel to Washington, see what other customers have to say about Delta, KLM and United Airlines. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,920 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,920 reviews
Delta
8.0
Very good
7,920 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
7,920 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,685 reviews
Delta
8.0
Very good
7,920 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Turkish Airlines
7.3
Good
3,775 reviews
Delta
8.0
Very good
7,920 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,920 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Basel to Washington. 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 from for flights from Basel to Washington?

    For a flight from Basel to Washington, you will be flying from EuroAirport Swiss. Basel EuroAirport Swiss (BSL) is just 3.6 mi from the center of the city.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Basel EuroAirport Swiss to State of Washington (average of $238). Flying from Basel EuroAirport Swiss to State of Washington in July is currently the most expensive (average of $411). 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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