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$424+ Cheap flights from Seattle (SEA) to Basel (EAP)

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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — EAP
Feb 4 — Feb 111
Tue 2/4
Tue 2/11
1 adult, Economy
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Cheap flight deals from Seattle to Basel

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Basel (EAP). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$503
(Booking.com)

One-way from

$424
(Lufthansa)

Popular in

June

Cheapest in

March

Average price

$566
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 Seattle/Tacoma Intl to Basel (EAP)
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One-way flight from Seattle/Tacoma Intl to Basel (EAP)
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Highest demand for flights based on searches. 34% potential increase in price ($396 potential increase over avg. RT price).
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Cheapest flight prices on average. 9% potential price decrease ($68 potential savings vs. average RT price).
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Average for round-trip flights in January 2025
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Find flight deals from Seattle to Basel

Cheapest flights from Seattle to Basel
Explore the most affordable flight options available from Seattle to Basel. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 30, 2025.

This Booking.com deal was found by Cheapflights users on 1/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/112:35 pmSEA - BSL
1 stop23h 45mBritish Airways
Tue 3/186:55 amBSL - SEA
1 stop13h 25mBritish Airways
Deal found 1/28$503
This Gotogate deal was found by Cheapflights users on 1/28. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/310:35 amSEA - BSL
2 stops14h 50mAir Canada
Mon 3/107:00 amBSL - SEA
2 stops19h 25mAir Canada
Deal found 1/28$508
This Gotogate deal was found by Cheapflights users on 1/30. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/116:05 amSEA - BSL
2 stops20h 25mMultiple Airlines
Tue 3/186:50 amBSL - SEA
2 stops19h 35mMultiple Airlines
Deal found 1/30$510
This KLM deal was found by Cheapflights users on 1/28. 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.
Mon 3/37:10 amSEA - BSL
2 stops18h 30mKLM
Mon 3/106:05 amBSL - SEA
1 stop14h 35mKLM
Deal found 1/28$521
This Kiwi.com deal was found by Cheapflights users on 1/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/114:10 pmSEA - BSL
1 stop12h 15mLufthansa
Tue 3/186:50 amBSL - SEA
2 stops19h 35mLufthansa
Deal found 1/30$522
This American Airlines deal was found by Cheapflights users on 1/30. 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.
Tue 3/117:50 pmSEA - BSL
1 stop18h 30mAmerican Airlines
Tue 3/186:55 amBSL - SEA
1 stop13h 25mAmerican Airlines
Deal found 1/30$534
This United Airlines deal was found by Cheapflights users on 1/28. 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 3/155:00 amSEA - BSL
2 stops30h 25mUnited Airlines
Sat 3/2211:05 amBSL - SEA
2 stops42h 25mUnited Airlines
Deal found 1/28$552
This SWISS deal was found by Cheapflights users on 1/29. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/191:45 pmSEA - BSL
2 stops24h 10mSWISS
Sun 9/76:20 amBSL - SEA
2 stops21h 16mSWISS
Deal found 1/29$4,325

Find flights from Seattle to Basel within your budget

Customize your flight search to find flights from Seattle 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 January 30, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 3/11

2:35 pm-10:20 pm

1 stop23h 45m

Basel EuroAirport Swiss

Tue 3/18

6:55 am-12:20 pm

1 stop13h 25m

$503

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Mon 3/3

10:35 am-10:25 am

2 stops14h 50m

Basel EuroAirport Swiss

Mon 3/10

7:00 am-6:25 pm

2 stops19h 25m

$508

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 3/11

6:05 am-10:30 am

2 stops20h 25m

Basel EuroAirport Swiss

Tue 3/18

6:50 am-6:25 pm

2 stops19h 35m

$510

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Mon 3/3

7:10 am-10:40 am

2 stops18h 30m

Basel EuroAirport Swiss

Mon 3/10

6:05 am-12:40 pm

1 stop14h 35m

$521

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 3/11

4:10 pm-12:25 pm

1 stop12h 15m

Basel EuroAirport Swiss

Tue 3/18

6:50 am-6:25 pm

2 stops19h 35m

$522

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 3/11

7:50 pm-10:20 pm

1 stop18h 30m

Basel EuroAirport Swiss

Tue 3/18

6:55 am-12:20 pm

1 stop13h 25m

$534

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sat 3/15

5:00 am-7:25 pm

2 stops30h 25m

Basel EuroAirport Swiss

Sat 3/22

11:05 am-9:30 pm

2 stops42h 25m

$552

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Mon 6/16

7:05 pm-6:00 pm

1 stop37h 55m

Basel EuroAirport Swiss

Mon 6/23

6:55 pm-5:10 pm

1 stop31h 15m

$5,374

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 2/4

10:35 am-7:25 pm

2 stops23h 50m

$424

SeattleBasel

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 2/5

10:35 am-1:10 pm

2 stops17h 35m

$425

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/29

Showing 1-10 of 16 results
1
2

Compare providers for flights from Seattle to Basel

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Basel in January.
ProviderPrice AccuracyTrust Score*
AranGrantPrice Accuracy3 starsTrust Score*1 star
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Basel flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Basel flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Basel flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Basel flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Basel flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Basel

Have a flexible travel schedule? Discover the best time to fly to Basel from Seattle 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.

Travel insights for flights from Seattle to Basel

Get recent, data-driven insights about flights from Seattle to Basel including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Seattle to Basel?

Currently, January is the cheapest month in which you can book a flight from Seattle to Basel (average of $545). Flying from Seattle to Basel 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 SEA to EAP?

Find hourly flight availability from Seattle 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 January 30, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 5% on flights from Seattle to Basel by exploring options for tickets in the morning.

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 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 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, 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 January 30, 2025.
Read reviews from past customers who have flown KLM, United Airlines and Turkish Airlines from Seattle to Basel. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,335 reviews

Overall

7.8

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.2

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

KLM
7.8
Good
1,335 reviews
KLM
7.8
Good
1,335 reviews

Overall

7.8

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.2

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

United Airlines
7.4
Good
8,913 reviews
KLM
7.8
Good
1,335 reviews

Overall

7.8

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.2

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

Turkish Airlines
7.3
Good
3,904 reviews
KLM
7.8
Good
1,335 reviews

Overall

7.8

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.2

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

American Airlines
7.2
Good
10,000 reviews
KLM
7.8
Good
1,335 reviews

Overall

7.8

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.2

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

Air Canada
7.0
Good
8,640 reviews
KLM
7.8
Good
1,335 reviews

Overall

7.8

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.3

Entertainment

7.2

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

Related info for your journey

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

  • What are the cheapest airlines flying from Seattle to Basel round-trip?

    Our cheapest airline available from Seattle to Basel is British Airways. Our recent data shows that you can find tickets from as low as $503 on this airline. Additional options worth looking into are Air Canada and Lufthansa, starting at $508 and $513 round-trip. British Airways is 34% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Seattle to Basel one-way?

    One-way options have recently been found by users for as low as $424 on Lufthansa. Other airlines that offer cheap prices include Air Canada from $425 and United Airlines from $428 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle 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 Seattle to Basel?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Basel (average of $545). Flying from Seattle to Basel 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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Top 3 airlines flying from Seattle to Basel

Discover the top 3 airlines that operate flights from Seattle 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 January 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$443Average$624FlexibilityNo cancel feeOn-time70%
Air FranceCheapest$502Average$769FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$571Average$591FlexibilityNo cancel feeOn-time76%
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