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$478+ 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 8/12. Fares are subject to change and may not be available on all flights or dates of travel.
BSL — SEA
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Round-trip from

$527
(American Airlines)

One-way from

$478
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$642
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 May 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 May 1, 2025.

This American Airlines deal was found by Cheapflights users on 4/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/306:00 amBSL - SEA
1 stop14h 35mAmerican Airlines
Sat 6/78:20 pmSEA - BSL
1 stop12h 20mAmerican Airlines
Deal found 4/30$527
This British Airways deal was found by Cheapflights users on 4/30. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/86:10 amBSL - SEA
1 stop14h 25mBritish Airways
Mon 5/128:20 pmSEA - BSL
1 stop13h 00mBritish Airways
Deal found 4/30$528
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/306:15 amBSL - SEA
2 stops18h 53mDelta
Sat 6/76:00 amSEA - BSL
2 stops18h 30mDelta
Deal found 4/30$546
This Billigflug deal was found by Cheapflights users on 4/30. 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 Billigflug is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/86:10 amBSL - SEA
2 stops20h 18mMultiple Airlines
Mon 5/126:20 amSEA - BSL
2 stops20h 25mMultiple Airlines
Deal found 4/30$550
This KLM deal was found by Cheapflights users on 5/1. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/232:25 pmBSL - SEA
1 stop30h 10mKLM
Wed 9/242:10 pmSEA - BSL
1 stop34h 25mKLM
Deal found 5/1$572
This American Airlines deal was found by Cheapflights users on 4/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/1711:50 amBSL - PDX
2 stops44h 09mAmerican Airlines
Thu 6/123:14 pmPDX - BSL
2 stops18h 51mAmerican Airlines
Deal found 4/30$580
This British Airways deal was found by Cheapflights users on 4/30. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1411:40 amBSL - PDX
1 stop14h 55mBritish Airways
Fri 6/131:09 pmPDX - BSL
2 stops19h 31mBritish Airways
Deal found 4/30$597
This United Airlines deal was found by Cheapflights users on 5/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/3111:30 amBSL - SEA
2 stops42h 41mUnited Airlines
Thu 1/17:30 amSEA - BSL
2 stops19h 55mUnited Airlines
Deal found 5/1$644
This Lufthansa deal was found by Cheapflights users on 4/30. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/76:30 pmBSL - SEA
2 stops35h 18mLufthansa
Sun 7/206:50 pmSEA - BSL
1 stop15h 45mLufthansa
Deal found 4/30$647
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/3110:15 amBSL - PDX
1 stop34h 05mDelta
Sun 6/156:55 amPDX - BSL
2 stops17h 40mDelta
Deal found 4/30$748
This KLM deal was found by Cheapflights users on 4/30. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/296:30 pmBSL - PDX
1 stop25h 50mKLM
Thu 6/126:55 amPDX - BSL
2 stops17h 40mKLM
Deal found 4/30$789
This American Airlines deal was found by Cheapflights users on 4/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/212:10 pmBSL - PDX
2 stops44h 49mMultiple Airlines
Fri 6/131:09 pmPDX - BSL
2 stops19h 31mMultiple Airlines
Deal found 4/30$834

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 May 1, 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

8:20 pm-5:40 pm

1 stop12h 20m

$527

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Fri 5/30

11:45 am-11:09 pm

2 stops20h 24m

Seattle/Tacoma Intl

Sat 6/7

1:35 pm-5:40 pm

1 stop19h 05m

$534

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Fri 5/30

6:15 am-4:08 pm

2 stops18h 53m

Seattle/Tacoma Intl

Sat 6/7

6:00 am-9:30 am

2 stops18h 30m

$546

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sat 8/23

2:25 pm-11:35 am

1 stop30h 10m

Seattle/Tacoma Intl

Wed 9/24

2:10 pm-9:35 am

1 stop34h 25m

$572

BaselPortland

BSL - PDX

BSLPDX

Basel EuroAirport Swiss

Sat 5/17

11:50 am-10:59 pm

2 stops44h 09m

Portland

Thu 6/12

3:14 pm-7:05 pm

2 stops18h 51m

$580

BaselPortland

BSL - PDX

BSLPDX

Basel EuroAirport Swiss

Wed 5/14

11:40 am-5:35 pm

1 stop14h 55m

Portland

Fri 6/13

1:09 pm-5:40 pm

2 stops19h 31m

$597

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sat 5/17

11:50 am-11:30 am

1 stop32h 40m

Seattle/Tacoma Intl

Sat 5/31

8:20 pm-5:40 pm

1 stop12h 20m

$639

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sat 5/31

11:30 am-9:11 pm

2 stops42h 41m

Seattle/Tacoma Intl

Thu 1/1

7:30 am-12:25 pm

2 stops19h 55m

$644

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Mon 7/7

6:30 pm-8:48 pm

2 stops35h 18m

Seattle/Tacoma Intl

Sun 7/20

6:50 pm-7:35 pm

1 stop15h 45m

$647

BaselPortland

BSL - PDX

BSLPDX

Basel EuroAirport Swiss

Sat 5/31

10:15 am-11:20 am

1 stop34h 05m

Portland

Sun 6/15

6:55 am-9:35 am

2 stops17h 40m

$748

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 21 results
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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 May 1, 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
7,934 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

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
7,934 reviews
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

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
1,334 reviews
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

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
8,696 reviews
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

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
3,791 reviews
Delta
8.0
Very good
7,934 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

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
7,934 reviews

Crew

8.5

Entertainment

7.9

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

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 $405). 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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