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$501+ Cheap flights from Basel EuroAirport Swiss (BSL) to Washington

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 4/24. Fares are subject to change and may not be available on all flights or dates of travel.
BSL — SEA
Apr 9 — Apr 161
Wed 4/9
Wed 4/16
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 4, 2025.

Round-trip from

$501
(British Airways)

Popular in

December

Cheapest in

April

Average price

$471
From Basel EuroAirport Swiss to Washington
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($171 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 4, 2025.

This British Airways deal was found by Cheapflights users on 4/3. 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.
Thu 4/2412:15 pmBSL - SEA
1 stop15h 05mBritish Airways
Tue 4/298:20 pmSEA - BSL
1 stop13h 10mBritish Airways
Deal found 4/3$501
This Finnair deal was found by Cheapflights users on 4/4. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/611:10 amBSL - SEA
2 stops20h 59mMultiple Airlines
Thu 5/291:30 pmSEA - BSL
1 stop20h 35mMultiple Airlines
Deal found 4/4$509
This Delta deal was found by Cheapflights users on 4/3. 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.
Fri 4/256:15 amBSL - SEA
1 stop14h 30mDelta
Sun 5/256:07 pmSEA - BSL
1 stop14h 43mDelta
Deal found 4/3$515
This American Airlines deal was found by Cheapflights users on 4/3. 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.
Thu 4/246:10 amBSL - SEA
2 stops25h 59mAmerican Airlines
Tue 4/291:35 pmSEA - BSL
2 stops24h 15mAmerican Airlines
Deal found 4/3$516
This KLM deal was found by Cheapflights users on 4/3. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/172:25 pmBSL - SEA
1 stop30h 15mKLM
Sat 5/312:10 pmSEA - BSL
1 stop34h 25mKLM
Deal found 4/3$588
This United Airlines deal was found by Cheapflights users on 4/4. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2011:30 amBSL - SEA
2 stops18h 24mUnited Airlines
Sun 9/2811:50 pmSEA - BSL
2 stops34h 45mUnited Airlines
Deal found 4/4$602
This Flysmarter deal was found by Cheapflights users on 4/3. 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 Flysmarter is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/236:05 amBSL - SEA
1 stop14h 50mLufthansa
Wed 9/242:20 pmSEA - BSL
1 stop14h 20mLufthansa
Deal found 4/3$618
This American Airlines deal was found by Cheapflights users on 4/3. 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.
Thu 7/246:10 amBSL - PDX
1 stop20h 25mAmerican Airlines
Mon 9/11:15 pmPDX - BSL
2 stops24h 35mAmerican Airlines
Deal found 4/3$672
This British Airways deal was found by Cheapflights users on 4/3. 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.
Thu 7/246:10 amBSL - PDX
1 stop20h 25mBritish Airways
Mon 9/17:25 pmPDX - BSL
1 stop18h 25mBritish Airways
Deal found 4/3$801
This KAYAK deal was found by Cheapflights users on 4/3. 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.
Thu 7/2412:15 pmBSL - PDX
1 stop14h 20mMultiple Airlines
Sun 8/311:43 amPDX - BSL
2 stops31h 37mMultiple Airlines
Deal found 4/3$1,203
This Bravofly deal was found by Cheapflights users on 4/3. 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 Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/319:45 amBSL - PDX
2 stops22h 11mAir Canada
Mon 8/117:40 pmPDX - BSL
2 stops38h 55mAir Canada
Deal found 4/3$1,525
This Austrian Airlines deal was found by Cheapflights users on 4/3. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/188:25 pmBSL - SEA
2 stops32h 53mAustrian Airlines
Sun 5/257:00 amSEA - BSL
2 stops41h 40mAustrian Airlines
Deal found 4/3$1,550

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 4, 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

Thu 4/24

5:10 pm-11:35 am

1 stop27h 25m

Seattle/Tacoma Intl

Tue 4/29

1:35 pm-3:05 pm

2 stops16h 30m

$501

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Tue 5/6

11:10 am-11:09 pm

2 stops20h 59m

Seattle/Tacoma Intl

Thu 5/29

1:30 pm-7:05 pm

1 stop20h 35m

$509

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Fri 4/25

6:15 am-11:45 am

1 stop14h 30m

Seattle/Tacoma Intl

Sun 5/25

6:07 pm-5:50 pm

1 stop14h 43m

$515

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Thu 4/24

6:10 am-11:09 pm

2 stops25h 59m

Seattle/Tacoma Intl

Tue 4/29

1:35 pm-10:50 pm

2 stops24h 15m

$516

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sat 5/17

2:25 pm-11:40 am

1 stop30h 15m

Seattle/Tacoma Intl

Sat 5/31

2:10 pm-9:35 am

1 stop34h 25m

$588

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sat 9/20

11:30 am-8:54 pm

2 stops18h 24m

Seattle/Tacoma Intl

Sun 9/28

11:50 pm-7:35 pm

2 stops34h 45m

$602

BaselSeattle

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sat 8/23

6:05 am-11:55 am

1 stop14h 50m

Seattle/Tacoma Intl

Wed 9/24

2:20 pm-1:40 pm

1 stop14h 20m

$618

BaselPortland

BSL - PDX

BSLPDX

Basel EuroAirport Swiss

Thu 7/24

6:10 am-5:35 pm

1 stop20h 25m

Portland

Mon 9/1

1:15 pm-10:50 pm

2 stops24h 35m

$672

BaselPortland

BSL - PDX

BSLPDX

Basel EuroAirport Swiss

Thu 7/24

6:10 am-5:35 pm

1 stop20h 25m

Portland

Mon 9/1

7:25 pm-10:50 pm

1 stop18h 25m

$801

BaselPortland

BSL - PDX

BSLPDX

Basel EuroAirport Swiss

Thu 7/24

12:15 pm-5:35 pm

1 stop14h 20m

Portland

Sun 8/31

1:43 am-6:20 pm

2 stops31h 37m

$1,203

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/4

Showing 1-10 of 18 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 4, 2025.
To help decide which airline to fly from Basel to Washington, see what other customers have to say about Delta, KLM and Austrian 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
7,901 reviews

Food

7.3

Comfort

8.0

Overall

8.0

Entertainment

7.9

Crew

8.5

Boarding

8.2

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
7,901 reviews
Delta
8.0
Very good
7,901 reviews

Food

7.3

Comfort

8.0

Overall

8.0

Entertainment

7.9

Crew

8.5

Boarding

8.2

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
1,324 reviews
Delta
8.0
Very good
7,901 reviews

Food

7.3

Comfort

8.0

Overall

8.0

Entertainment

7.9

Crew

8.5

Boarding

8.2

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
Austrian Airlines
7.6
Good
771 reviews
Delta
8.0
Very good
7,901 reviews

Food

7.3

Comfort

8.0

Overall

8.0

Entertainment

7.9

Crew

8.5

Boarding

8.2

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
8,618 reviews
Delta
8.0
Very good
7,901 reviews

Food

7.3

Comfort

8.0

Overall

8.0

Entertainment

7.9

Crew

8.5

Boarding

8.2

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
3,750 reviews
Delta
8.0
Very good
7,901 reviews

Food

7.3

Comfort

8.0

Overall

8.0

Entertainment

7.9

Crew

8.5

Boarding

8.2

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.

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

    The cheapest airlines for a one-way flight from Basel EuroAirport Swiss to State of Washington are Delta ($827), British Airways ($840), and United Airlines ($1,400).

  • 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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