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Cheap flights from Basel EuroAirport Swiss (BSL) to Seattle (SEA) from $456

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 6/18. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
BSL — SEA
May 14 — May 211
From?
To?
Tue 5/14
Tue 5/21
1 adult, Economy
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Cheap flight deals from Basel to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Basel (BSL) to Seattle (SEA). 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 May 9, 2024.

Popular in

July

Cheapest in

November

Average price

$699

Round-trip from

$247
High demand for flights, 29% potential price rise
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Best time to find cheap flights, 34% potential price drop
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Average for round-trip flights in May 2024
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From Basel EuroAirport Swiss to Seattle/Tacoma Intl
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What is the cheapest day to fly round-trip from Basel EuroAirport Swiss to Seattle?

Flights from Basel EuroAirport Swiss to Seattle are found to be more expensive on Friday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Seattle.

What is the cheapest month to fly from Basel EuroAirport Swiss to Seattle?

Due to multiple factors, expect to potentially pay more when booking in July. For low rates, January can be a great choice for travel to Seattle. Flights to Seattle from Basel EuroAirport Swiss in January are about $555 on average during January, but can be found for as low as $369.

When is the cheapest time to fly from Basel EuroAirport Swiss to Seattle (BSL - SEA)?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Basel EuroAirport Swiss to Seattle as you normally would.

Cheap United Airlines flights from Basel to Seattle

Explore cheap flight options specifically provided by United Airlines for the route between Basel and Seattle. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,752,338 searches. Data last updated May 9, 2024.
Take a look at some of the lowest-priced United Airlines flights heading from Basel to Seattle. Be sure to come back soon if the deals available don't appeal to you at this time.
Mon 8/511:15 amBSL - SEA
1 stop34h 00mUnited Airlines
Mon 8/197:00 amSEA - BSL
2 stops21h 30mUnited Airlines
Deal found 5/8$892
Mon 8/511:15 amBSL - SEA
1 stop34h 00mUnited Airlines
Tue 8/1311:03 amSEA - BSL
2 stops17h 27mUnited Airlines
Deal found 5/8$936

Cheap Air Canada flights from Basel to Seattle

Explore cheap flight options specifically provided by Air Canada for the route between Basel and Seattle. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,752,338 searches. Data last updated May 9, 2024.
Take a gander at the lowest prices we've found on Air Canada flights from Basel to Seattle. Check back soon if you're not seeing flights that suit your needs.
Sun 6/26:40 amBSL - SEA
2 stops20h 47mAir Canada
Sat 6/810:40 amSEA - BSL
2 stops14h 50mAir Canada
Deal found 5/9$570
Fri 5/316:40 amBSL - SEA
2 stops24h 18mAir Canada
Sat 6/85:55 amSEA - BSL
2 stops19h 35mAir Canada
Deal found 5/9$576
Wed 6/126:40 amBSL - SEA
2 stops16h 47mAir Canada
Mon 7/111:40 amSEA - BSL
2 stops17h 00mAir Canada
Deal found 5/8$577
Wed 7/316:40 amBSL - SEA
2 stops24h 18mAir Canada
Wed 8/1411:40 amSEA - BSL
2 stops17h 00mAir Canada
Deal found 5/8$710
Wed 6/126:40 amBSL - SEA
2 stops16h 47mAir Canada
Sun 6/3010:40 amSEA - BSL
2 stops15h 00mAir Canada
Deal found 5/8$780

Cheap Basel to Seattle flights in May & June 2024

Find cheap flight options from Basel to Seattle specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,752,338 searches. Prices were last updated on May 9, 2024.
Check out some of the best flight deals from Basel to Seattle in 2024. Check back regularly for other flight deals.
Mon 6/36:15 amBSL - SEA
1 stop19h 20mDelta
Mon 6/106:05 pmSEA - BSL
1 stop14h 50mDelta
Deal found 5/9$465
Mon 6/36:35 amBSL - SEA
2 stops25h 30mAmerican Airlines
Mon 6/105:10 amSEA - BSL
2 stops32h 45mAmerican Airlines
Deal found 5/9$467
Mon 6/36:35 amBSL - SEA
2 stops38h 51mAmerican Airlines
Mon 6/105:10 amSEA - BSL
2 stops32h 45mAmerican Airlines
Deal found 5/8$468
Tue 6/1111:55 amBSL - SEA
2 stops19h 02mBritish Airways
Thu 6/277:06 amSEA - BSL
2 stops18h 49mBritish Airways
Deal found 5/8$470
Sat 6/16:15 amBSL - SEA
1 stop13h 05mAir France
Thu 6/61:35 pmSEA - BSL
1 stop19h 25mAir France
Deal found 5/9$509
Sat 6/16:15 amBSL - SEA
1 stop13h 05mAir France
Sat 6/86:05 pmSEA - BSL
1 stop18h 35mAir France
Deal found 5/9$514
Mon 6/36:15 amBSL - SEA
2 stops18h 59mDelta
Mon 6/106:05 pmSEA - BSL
1 stop14h 50mDelta
Deal found 5/8$520
Tue 6/116:40 amBSL - SEA
1 stop13h 55mAmerican Airlines
Mon 7/17:06 amSEA - BSL
2 stops18h 54mAmerican Airlines
Deal found 5/8$545
Fri 6/146:40 amBSL - SEA
2 stops20h 26mAmerican Airlines
Mon 7/17:06 amSEA - BSL
2 stops18h 54mAmerican Airlines
Deal found 5/8$550

Basel to Seattle 2024 flight deals

Discover exclusive flight deals for travel between Basel and Seattle in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,752,338 searches. Data last updated May 9, 2024.
Check out some of the best flight deals from Basel to Seattle in 2024. Check back regularly for other flight deals.
Mon 6/36:15 amBSL - SEA
1 stop19h 20mDelta
Mon 6/106:05 pmSEA - BSL
1 stop14h 50mDelta
Deal found 5/9$465
Mon 6/36:35 amBSL - SEA
2 stops25h 30mAmerican Airlines
Mon 6/105:10 amSEA - BSL
2 stops32h 45mAmerican Airlines
Deal found 5/9$467
Mon 6/36:35 amBSL - SEA
2 stops38h 51mAmerican Airlines
Mon 6/105:10 amSEA - BSL
2 stops32h 45mAmerican Airlines
Deal found 5/8$468
Tue 6/1111:55 amBSL - SEA
2 stops19h 02mBritish Airways
Mon 7/17:06 amSEA - BSL
2 stops18h 54mBritish Airways
Deal found 5/8$470
Sat 6/16:15 amBSL - SEA
1 stop13h 05mAir France
Thu 6/61:35 pmSEA - BSL
1 stop19h 25mAir France
Deal found 5/9$509
Sat 6/16:15 amBSL - SEA
1 stop13h 05mAir France
Sat 6/86:05 pmSEA - BSL
1 stop18h 35mAir France
Deal found 5/9$514
Mon 6/36:15 amBSL - SEA
2 stops18h 59mDelta
Mon 6/106:05 pmSEA - BSL
1 stop14h 50mDelta
Deal found 5/8$520
Tue 6/116:40 amBSL - SEA
1 stop13h 55mAmerican Airlines
Mon 7/17:06 amSEA - BSL
2 stops18h 54mAmerican Airlines
Deal found 5/8$545
Fri 6/146:40 amBSL - SEA
2 stops20h 26mAmerican Airlines
Mon 7/17:06 amSEA - BSL
2 stops18h 54mAmerican Airlines
Deal found 5/8$550

One-way flights to Seattle from Basel

Search for one-way flight options from Basel to Seattle. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,752,338 searches. Data last updated May 9, 2024.
Some of the best available deals we've found on one-way flights from Basel to Seattle. Users needing a return flight from Basel to Seattle should utilize the search form above.
Tue 6/186:15 amBSL - SEA
2 stops23h 06mMultiple Airlines
Deal found 5/9$456
Tue 6/186:15 amBSL - SEA
3 stops36h 45mMultiple Airlines
Deal found 5/9$530
Tue 6/186:40 amBSL - SEA
1 stop13h 55mMultiple Airlines
Deal found 5/9$695
Tue 7/3011:15 amBSL - SEA
2 stops19h 39mMultiple Airlines
Deal found 5/9$882
Tue 7/308:25 amBSL - SEA
1 stop15h 30mMultiple Airlines
Deal found 5/9$1,592

Find flights from Basel to Seattle within your budget

Customize your flight search to find flights from Basel to Seattle 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 2,752,338 searches. Data last updated May 9, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$465 - $892

Route

Depart

Return

Price

Basel EuroAirport SwissSeattle/Tacoma Intl

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Mon 6/3

1 stop19h 20m

Seattle/Tacoma Intl

Mon 6/10

1 stop14h 50m

$465

Basel EuroAirport SwissSeattle/Tacoma Intl

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Mon 6/3

2 stops25h 30m

Seattle/Tacoma Intl

Mon 6/10

2 stops32h 45m

$467

Basel EuroAirport SwissSeattle/Tacoma Intl

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Tue 6/11

2 stops19h 02m

Seattle/Tacoma Intl

Mon 7/1

2 stops18h 54m

$470

Basel EuroAirport SwissSeattle/Tacoma Intl

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sat 6/1

1 stop13h 05m

Seattle/Tacoma Intl

Thu 6/6

1 stop19h 25m

$509

Basel EuroAirport SwissSeattle/Tacoma Intl

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Sun 6/2

2 stops20h 47m

Seattle/Tacoma Intl

Sat 6/8

2 stops14h 50m

$570

Basel EuroAirport SwissSeattle/Tacoma Intl

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Tue 6/11

1 stop13h 55m

Seattle/Tacoma Intl

Mon 7/1

1 stop18h 15m

$584

Basel EuroAirport SwissSeattle/Tacoma Intl

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Fri 5/31

1 stop12h 24m

Seattle/Tacoma Intl

Sat 6/8

2 stops14h 50m

$613

Basel EuroAirport SwissSeattle/Tacoma Intl

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Mon 6/10

1 stop30h 50m

Seattle/Tacoma Intl

Mon 7/1

1 stop38h 20m

$856

Basel EuroAirport SwissSeattle/Tacoma Intl

BSL - SEA

BSLSEA

Basel EuroAirport Swiss

Mon 8/5

1 stop34h 00m

Seattle/Tacoma Intl

Mon 8/19

2 stops21h 30m

$892

Flights are sorted by cheapest first

Deals found on 5/9

When is the cheapest time to fly from Basel EuroAirport Swiss to Seattle?

Use this chart to determine the cheapest time to fly round-trip from Basel to Seattle. Price data was last updated on May 5, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Basel EuroAirport Swiss to Seattle flight should consider departing on Monday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
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Average price of flights to Seattle by month

Plan your trip from Basel to Seattle by taking into account the cheapest months to travel. The average price of a one-way flight from Basel to Seattle is currently $831 while a round-trip flight costs $603. Price data was last updated on May 5, 2024.

Currently, January is the cheapest month in which you can book a flight from Basel EuroAirport Swiss to Seattle (average of $247). Flying from Basel EuroAirport Swiss to Seattle in July is currently the most expensive (average of $408). 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.

January

$247

February

$254

March

$288

April

$294

May

$321

June

$406

July

$408

August

$342

September

$278

October

$256

November

$258

December

$247

Temperature and rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average temperature and rainfall totals by month.

SEA

Temperature

41 - 66.2 °F

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated May 9, 2024.
To help decide which airline to fly from Basel to Seattle, see what other customers have to say about United Airlines, Air Canada and Delta. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.1
Very good
10,789 reviews
Check prices

Food

7.4

Overall

8.1

Entertainment

8.0

Comfort

7.9

Boarding

8.2

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Delta
8.1
Very good
10,789 reviews
Delta
8.1
Very good
10,789 reviews
Check prices

Food

7.4

Overall

8.1

Entertainment

8.0

Comfort

7.9

Boarding

8.2

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Air France
7.5
Good
1,777 reviews
Delta
8.1
Very good
10,789 reviews
Check prices

Food

7.4

Overall

8.1

Entertainment

8.0

Comfort

7.9

Boarding

8.2

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Turkish Airlines
7.5
Good
3,712 reviews
Delta
8.1
Very good
10,789 reviews
Check prices

Food

7.4

Overall

8.1

Entertainment

8.0

Comfort

7.9

Boarding

8.2

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

United Airlines
7.4
Good
11,043 reviews
Delta
8.1
Very good
10,789 reviews
Check prices

Food

7.4

Overall

8.1

Entertainment

8.0

Comfort

7.9

Boarding

8.2

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

American Airlines
7.3
Good
14,677 reviews
Delta
8.1
Very good
10,789 reviews
Check prices

Food

7.4

Overall

8.1

Entertainment

8.0

Comfort

7.9

Boarding

8.2

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Related info for your journey

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

  • Can I find flights from Basel EuroAirport Swiss to Seattle for under $500 on Cheapflights?

    Yes, there are multiple flights from Basel EuroAirport Swiss to Seattle for under $500. The cheapest flight booked recently is on Delta for just $465, but on average you can expect to pay $541.

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

    Delta, at $465, was found to be the cheapest airline from Basel EuroAirport Swiss to Seattle.Alternate airlines to your destination round-trip include American Airlines and British Airways. Delta is priced at 28% lower than the current average price of a flight leaving 3 months from now.

  • What does BSL to SEA mean?

    BSL and SEA are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. BSL to SEA refers to a flight route from Basel EuroAirport Swiss to Seattle/Tacoma Intl Airport.

  • Can I find deals for flights from Basel to Seattle that include extra baggage allowance?

    The amount of baggage you can bring on your Basel to Seattle flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Basel to Seattle with specific airlines?

    Yes, Cheapflights allows you to browse and filter Basel to Seattle flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Basel to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from Basel to Seattle that allow pets onboard?

    Many airlines flying from Basel to Seattle offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Basel to Seattle?

    Yes, you can often find last-minute deals on Basel to Seattle flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Basel EuroAirport Swiss to Seattle flight deals updated?

    The Basel EuroAirport Swiss to Seattle flight deals you see on this page were last updated on 5/9.

See more FAQs

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