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Cheap flights from Seattle (SEA) to Basel EuroAirport Swiss (BSL) from $123

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 9/3. 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.
SEA — BSL
May 21 — May 281
From?
To?
Tue 5/21
Tue 5/28
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 (BSL). 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 16, 2024.

Popular in

June

Cheapest in

February

Average price

$1,255

Round-trip from

$558
High demand for flights, 41% potential price rise
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Best time to find cheap flights, 38% potential price drop
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Average for round-trip flights in May 2024
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From Seattle/Tacoma Intl to Basel EuroAirport Swiss
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What is the cheapest day to fly round-trip from Seattle to Basel EuroAirport Swiss?

Thursday flights are generally found to be more expensive for flights from Seattle to Basel EuroAirport Swiss. 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 Basel EuroAirport Swiss.

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

Flights from Seattle to Basel EuroAirport Swiss lean towards being more expensive in June. Prices are generally better when you fly from Seattle to Basel EuroAirport Swiss in November, with the cheapest ticket starting at $494.

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

A simple way to save on the total cost of your ticket is to fly from Seattle to Basel EuroAirport Swiss in the morning. If you’re flexible enough to do this you can expect to save up to 35% on your trip compared to booking a flight in the afternoon.

Cheap British Airways flights from Seattle to Basel

Explore cheap flight options specifically provided by British Airways for the route between Seattle and Basel. 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 2,637,452 searches. Data last updated May 16, 2024.
Take a peek at the cheapest British Airways flights we've detected traveling from Seattle to Basel. Make sure to check back often as deals are often changing.
Wed 10/307:45 pmSEA - BSL
1 stop14h 35mBritish Airways
Tue 11/127:00 amBSL - SEA
1 stop13h 25mBritish Airways
Deal found 5/16$483
Tue 9/31:30 pmSEA - BSL
1 stop12h 25mBritish Airways
Fri 9/206:40 amBSL - SEA
1 stop13h 55mBritish Airways
Deal found 5/16$603
Tue 9/37:40 pmSEA - BSL
1 stop13h 40mBritish Airways
Fri 9/2011:45 amBSL - SEA
2 stops20h 00mBritish Airways
Deal found 5/16$613
Sun 8/47:40 pmSEA - BSL
1 stop18h 15mBritish Airways
Thu 8/226:35 amBSL - SEA
2 stops24h 21mBritish Airways
Deal found 5/16$641
Fri 8/237:40 pmSEA - BSL
1 stop18h 15mBritish Airways
Wed 8/286:35 amBSL - SEA
1 stop14h 00mBritish Airways
Deal found 5/16$745
Fri 8/236:00 amSEA - BSL
2 stops31h 55mBritish Airways
Wed 8/287:05 pmBSL - SEA
1 stop25h 25mBritish Airways
Deal found 5/16$778
Fri 8/237:40 pmSEA - BSL
1 stop18h 15mBritish Airways
Wed 8/286:35 amBSL - SEA
2 stops27h 14mBritish Airways
Deal found 5/15$787
Fri 8/236:00 amSEA - BSL
2 stops31h 55mBritish Airways
Wed 8/286:35 amBSL - SEA
2 stops27h 14mBritish Airways
Deal found 5/16$792
Thu 7/181:30 pmSEA - BSL
1 stop20h 25mBritish Airways
Thu 7/256:35 amBSL - SEA
2 stops24h 23mBritish Airways
Deal found 5/15$825

Cheap American Airlines flights from Seattle to Basel

Explore cheap flight options specifically provided by American Airlines for the route between Seattle and Basel. 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 2,637,452 searches. Data last updated May 16, 2024.
Have a look at some of the cheapest available American Airlines flights departing from Seattle and landing in Basel. Make sure to examine the flight information before completing your reservation.
Wed 10/301:39 pmSEA - BSL
2 stops24h 21mAmerican Airlines
Tue 11/123:40 pmBSL - SEA
1 stop34h 05mAmerican Airlines
Deal found 5/15$488
Wed 10/301:39 pmSEA - BSL
2 stops20h 41mAmerican Airlines
Tue 11/127:00 amBSL - SEA
2 stops22h 50mAmerican Airlines
Deal found 5/15$496
Sun 8/47:40 pmSEA - BSL
1 stop18h 15mAmerican Airlines
Thu 8/226:35 amBSL - SEA
2 stops23h 06mAmerican Airlines
Deal found 5/15$612
Sun 8/41:29 pmSEA - BSL
2 stops24h 26mAmerican Airlines
Thu 8/226:35 amBSL - SEA
2 stops22h 04mAmerican Airlines
Deal found 5/15$616
Tue 11/51:43 amSEA - BSL
2 stops31h 37mAmerican Airlines
Wed 11/133:40 pmBSL - SEA
1 stop34h 05mAmerican Airlines
Deal found 5/15$694

Cheap Seattle to Basel flights in May & June 2024

Find cheap flight options from Seattle to Basel specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,637,452 searches. Prices were last updated on May 16, 2024.
Check out some of the best flight deals from Seattle to Basel in 2024. Check back regularly for other flight deals.
Fri 6/1411:05 amSEA - BSL
2 stops25h 55mMultiple Airlines
Fri 6/216:40 amBSL - SEA
2 stops20h 29mMultiple Airlines
Deal found 5/15$1,020
Sat 5/2511:25 amSEA - BSL
2 stops21h 15mMultiple Airlines
Sat 6/228:30 amBSL - SEA
1 stop14h 40mMultiple Airlines
Deal found 5/15$1,102
Sat 5/2511:25 amSEA - BSL
2 stops21h 15mMultiple Airlines
Sat 6/2211:05 amBSL - SEA
2 stops18h 34mMultiple Airlines
Deal found 5/15$1,112
Fri 6/146:20 pmSEA - BSL
1 stop14h 40mDelta
Fri 6/2110:55 amBSL - SEA
1 stop15h 40mDelta
Deal found 5/15$1,141
Fri 6/146:20 pmSEA - BSL
1 stop14h 40mDelta
Fri 6/2110:15 amBSL - SEA
2 stops19h 16mDelta
Deal found 5/15$1,154
Thu 6/1312:25 amSEA - BSL
2 stops32h 15mUnited Airlines
Fri 6/219:40 amBSL - SEA
2 stops18h 00mUnited Airlines
Deal found 5/15$1,258
Fri 6/145:55 amSEA - BSL
2 stops16h 20mMultiple Airlines
Fri 6/217:00 amBSL - SEA
3 stops33h 57mMultiple Airlines
Deal found 5/15$1,335
Fri 6/147:40 amSEA - BSL
3 stops29h 45mMultiple Airlines
Fri 6/218:25 pmBSL - SEA
3 stops34h 00mMultiple Airlines
Deal found 5/15$1,349
Thu 6/1312:25 amSEA - BSL
2 stops32h 15mUnited Airlines
Fri 6/211:35 pmBSL - SEA
1 stop12h 24mUnited Airlines
Deal found 5/15$1,426

Seattle to Basel 2024 flight deals

Discover exclusive flight deals for travel between Seattle and Basel in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,637,452 searches. Data last updated May 16, 2024.
Check out some of the best flight deals from Seattle to Basel in 2024. Check back regularly for other flight deals.
Wed 11/66:45 pmSEA - BSL
1 stop14h 35mBritish Airways
Wed 11/137:15 pmBSL - SEA
1 stop25h 10mBritish Airways
Deal found 5/15$483
Wed 11/61:39 pmSEA - BSL
2 stops19h 41mBritish Airways
Wed 11/1311:10 amBSL - SEA
1 stop14h 35mBritish Airways
Deal found 5/15$488
Wed 12/49:55 amSEA - BSL
2 stops18h 40mMultiple Airlines
Wed 12/116:45 amBSL - SEA
2 stops23h 29mMultiple Airlines
Deal found 5/15$493
Wed 10/301:39 pmSEA - BSL
2 stops20h 41mAmerican Airlines
Tue 11/127:00 amBSL - SEA
2 stops22h 50mAmerican Airlines
Deal found 5/15$496
Wed 11/65:35 amSEA - BSL
3 stops28h 50mUnited Airlines
Wed 11/136:45 amBSL - SEA
2 stops23h 29mUnited Airlines
Deal found 5/15$499
Wed 11/66:39 amSEA - BSL
3 stops21h 56mUnited Airlines
Wed 11/136:45 amBSL - SEA
2 stops24h 44mUnited Airlines
Deal found 5/15$518
Sun 9/11:40 pmSEA - BSL
1 stop19h 35mBritish Airways
Mon 12/27:55 pmBSL - SEA
1 stop24h 30mBritish Airways
Deal found 5/16$545
Tue 9/31:30 pmSEA - BSL
1 stop12h 25mBritish Airways
Fri 9/206:40 amBSL - SEA
1 stop13h 55mBritish Airways
Deal found 5/15$603
Sun 8/47:40 pmSEA - BSL
1 stop18h 15mAmerican Airlines
Thu 8/226:35 amBSL - SEA
2 stops23h 06mAmerican Airlines
Deal found 5/15$612

Seattle to Basel flights leaving soon

Find last-minute flight options from Seattle to Basel for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,637,452 searches. Data last updated May 16, 2024.
Have a look at some of the last-minute flights available departing from Seattle to Basel. Tip: verify your flight details before completing your reservation.
Sat 5/2511:25 amSEA - BSL
2 stops21h 15mMultiple Airlines
Sat 6/228:30 amBSL - SEA
1 stop14h 40mMultiple Airlines
Deal found 5/15$1,102
Sat 5/2511:25 amSEA - BSL
2 stops21h 15mMultiple Airlines
Sat 6/2211:05 amBSL - SEA
2 stops18h 34mMultiple Airlines
Deal found 5/15$1,112
Sat 5/255:15 pmSEA - BSL
1 stop15h 25mMultiple Airlines
Sat 6/228:30 amBSL - SEA
1 stop14h 40mMultiple Airlines
Deal found 5/15$4,706

One-way flights to Basel from Seattle

Search for one-way flight options from Seattle to Basel. 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 2,637,452 searches. Data last updated May 16, 2024.
Take a look at some of the one-way flights we've detected from Seattle to Basel. For those needing a return trip from Seattle, there is a search form available above.
Tue 9/36:45 pmSEA - BSL
2 stops16h 15mMultiple Airlines
Deal found 5/15$123
Tue 9/36:45 pmSEA - BSL
3 stops29h 55mMultiple Airlines
Deal found 5/15$235
Sun 8/46:15 pmSEA - BSL
3 stops52h 25mMultiple Airlines
Deal found 5/15$384
Sun 8/46:15 pmSEA - BSL
2 stops37h 45mMultiple Airlines
Deal found 5/15$394
Sun 5/267:00 amSEA - BSL
3 stops54h 55mMultiple Airlines
Deal found 5/14$409
Thu 8/291:50 pmSEA - BSL
3 stops33h 45mMultiple Airlines
Deal found 5/15$435
Sun 5/267:00 amSEA - BSL
2 stops27h 00mMultiple Airlines
Deal found 5/14$449
Sat 5/251:00 pmSEA - BSL
2 stops24h 25mMultiple Airlines
Deal found 5/14$465
Fri 8/307:00 amSEA - BSL
3 stops41h 00mMultiple Airlines
Deal found 5/15$506

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 2,637,452 searches. Data last updated May 16, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$483 - $995

Route

Depart

Return

Price

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 10/30

1 stop14h 35m

Basel EuroAirport Swiss

Tue 11/12

1 stop13h 25m

$483

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 10/30

2 stops24h 21m

Basel EuroAirport Swiss

Tue 11/12

1 stop34h 05m

$488

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 10/30

2 stops20h 41m

Basel EuroAirport Swiss

Tue 11/12

2 stops22h 50m

$496

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Wed 11/6

3 stops28h 50m

Basel EuroAirport Swiss

Wed 11/13

2 stops23h 29m

$499

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 8/4

1 stop19h 25m

Basel EuroAirport Swiss

Thu 8/22

1 stop12h 55m

$642

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Sun 8/4

1 stop14h 45m

Basel EuroAirport Swiss

Thu 8/22

1 stop12h 55m

$654

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 9/3

2 stops17h 05m

Basel EuroAirport Swiss

Fri 9/20

2 stops17h 50m

$665

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Tue 9/3

2 stops21h 00m

Basel EuroAirport Swiss

Fri 9/20

2 stops20h 46m

$707

Seattle/Tacoma IntlBasel EuroAirport Swiss

SEA - BSL

SEABSL

Seattle/Tacoma Intl

Mon 8/5

2 stops17h 05m

Basel EuroAirport Swiss

Tue 8/13

1 stop31h 00m

$995

Flights are sorted by cheapest first

Deals found on 5/16

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

Use this chart to determine the cheapest time to fly round-trip from Seattle to Basel. Price data was last updated on May 12, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their Seattle to Basel EuroAirport Swiss flight should consider departing on Sunday afternoons when fares are most often at their lowest. Tuesday at noon 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 Basel by month

Plan your trip from Seattle to Basel by taking into account the cheapest months to travel. The average price of a one-way flight from Seattle to Basel is currently $378 while a round-trip flight costs $625. Price data was last updated on May 12, 2024.

Temperature and rainfall in Basel by month

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

EAP

Temperature

33.8 - 66.2 °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 May 16, 2024.
Read through reviews of airlines operating flights from Seattle to Basel, such as British Airways, American Airlines and United Airlines. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
10,673 reviews
Check prices

Overall

8.0

Comfort

7.9

Entertainment

8.0

Food

7.4

Crew

8.6

Boarding

8.2

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Delta
8.0
Very good
10,673 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Overall

8.0

Comfort

7.9

Entertainment

8.0

Food

7.4

Crew

8.6

Boarding

8.2

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Air France
7.6
Good
1,764 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Overall

8.0

Comfort

7.9

Entertainment

8.0

Food

7.4

Crew

8.6

Boarding

8.2

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Turkish Airlines
7.4
Good
3,707 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Overall

8.0

Comfort

7.9

Entertainment

8.0

Food

7.4

Crew

8.6

Boarding

8.2

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

United Airlines
7.4
Good
10,924 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Overall

8.0

Comfort

7.9

Entertainment

8.0

Food

7.4

Crew

8.6

Boarding

8.2

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

American Airlines
7.3
Good
14,514 reviews
Delta
8.0
Very good
10,673 reviews
Check prices

Overall

8.0

Comfort

7.9

Entertainment

8.0

Food

7.4

Crew

8.6

Boarding

8.2

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

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.

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

    Yes, there are multiple flights from Seattle to Basel EuroAirport Swiss for under $500. The cheapest flight booked recently is on British Airways for just $483, but on average you can expect to pay $621.

  • Are there last-minute flights available from Seattle to Basel EuroAirport Swiss for under $1,200?

    There are currently 3+ open flights from Seattle to Basel EuroAirport Swiss within the next 7 days for less than $1,200.

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

    British Airways, at $483, was found to be the cheapest airline from Seattle to Basel EuroAirport Swiss.Alternate airlines to your destination round-trip include American Airlines and United Airlines. You may be able to fly from Seattle to Basel EuroAirport Swiss for 49% less than the average price by searching for these airlines.

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

    One-way options have recently been found by users for as low as $562 on United Airlines. Other airlines that offer cheap prices include American Airlines from $575 and Lufthansa from $1,028 one-way.

  • What does SEA to BSL mean?

    SEA stands for Seattle/Tacoma Intl Airport, while BSL stands for Basel EuroAirport Swiss. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry.

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

    The amount of baggage you can bring on your Seattle to Basel 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 Seattle to Basel with specific airlines?

    Yes, Cheapflights allows you to browse and filter Seattle to Basel 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 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.

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

    Many airlines flying from Seattle to Basel 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 Seattle to Basel?

    Yes, you can often find last-minute deals on Seattle to Basel 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 Seattle to Basel EuroAirport Swiss flight deals updated?

    The Seattle to Basel EuroAirport Swiss flight deals you see on this page were last updated on 5/16.

See more FAQs

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Alternative routes for Seattle to Basel
See prices for flight routes from nearby airports that may be better suited for you.

Portland to Basel flights

Top 2 airlines flying from Seattle to Basel

Discover the top 2 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 2,637,452 searches. Data last updated May 16, 2024.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$561Average$1,120FlexibilityNo cancel feeOn-time70%
Search British Airways flights
DeltaCheapest$719Average$1,271FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
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Search flights from Seattle to Basel by cabin class

Find flights from Seattle to Basel, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to Basel?

Cheapflights makes it easy to find Seattle to Basel flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Basel?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Seattle to Basel.

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Yes, we can. To see specific flights from Seattle to Basel with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Seattle to Basel become cheaper?

Not ready to book yet? You can track prices for flights from Seattle to Basel on Cheapflights with our Price Alert feature and get notified when better prices are available.

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