What are the cheapest airlines flying from Sioux Falls to Seattle round-trip?

Our cheapest airline available from Sioux Falls to Seattle is Frontier. Our recent data shows that you can find tickets from as low as $238 on this airline. Additional options worth looking into are Delta and United Airlines, starting at $269 and $288 round-trip. These flights start at 48% lower than the current average price 3 months from now.

What is the cheapest day to fly from Sioux Falls to Seattle?

Travelers seeking maximum savings on their Sioux Falls to Seattle flight should consider departing on Thursday at noon when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Seattle 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 Seattle when rainfall is around 0.7 in.

If weather is an important factor for your trip to Seattle, 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).

What are the most popular airlines that fly from Sioux Falls to Seattle?

Consider American Airlines, Delta or Frontier when booking your flight. These represent the most popular airlines when flying from Sioux Falls to Seattle.

What is the cheapest day to fly round-trip from Sioux Falls to Seattle?

Monday is generally a great day to depart. Flying on this day could help you save up to 37%.

How far in advance should I book a flight from Sioux Falls to Seattle?

Users have found that booking a flight from Sioux Falls to Seattle at least 30 days early can save you up to 161% on average compared to booking a flight this week. If booking 30 days before your flight isn’t an option for you, users have found flights from Sioux Falls to Seattle for as little as $305 when booking for a departure date within the next two weeks. You can also check prices now. Some users have found airline tickets as low as $875 for flights departing within the next 3 days.

What is the cheapest month to fly from Sioux Falls to Seattle?

Due to multiple factors, expect to potentially pay more when booking in March. For low rates, July can be a great choice for travel to Seattle. Flights to Seattle from Sioux Falls in July are about $459 on average during July, but can be found for as low as $193.

Can I find deals for flights from Sioux Falls to Seattle that include hotel bookings?

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

How can I find direct flights from Sioux Falls to Seattle?

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

Can I find deals for business class flights from Sioux Falls to Seattle?

Yes. Cheapflights offers flight deals from Sioux Falls 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.

$238+ Flights from Sioux Falls to Seattle

Q: How much does it cost to fly round-trip from Sioux Falls to Seattle?

Airfare is below average for this route at the moment. Sioux Falls to Seattle flights typically cost between $273 and $530 in August. The cheapest round-trip price found within the last 3 days was $238 on Frontier (Aug 21-Aug 29).

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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Sioux Falls Joe Foss Field to Seattle/Tacoma Intl are usually found in July or October, booked 29 days in advance, depart on a Tuesday or Saturday and return on a Saturday

Cheap flight deals from Sioux Falls to Seattle

Round-trip from	$238 (Frontier)
Popular in	March
Cheapest in	July
Average price	$339

From Sioux Falls Joe Foss Field to Seattle/Tacoma Intl

Search Deals

Highest demand for flights based on searches. 8% potential increase in price ($41 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease ($24 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in July 2025

Search Deals

Find flight deals from Sioux Falls to Seattle

Cheapest flights from Sioux Falls to Seattle
Explore the most affordable flight options available from Sioux Falls to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Thu 8/212:08 pmFSD - SEA

1 stop12h 26mFrontier

Fri 8/296:17 amSEA - FSD

1 stop5h 06mFrontier

Deal found 7/28

$238

Tue 9/1612:56 pmFSD - SEA

1 stop5h 33mDelta

Mon 9/2211:40 pmSEA - FSD

1 stop8h 27mDelta

Deal found 7/27

$269

Fri 10/249:30 amFSD - SEA

1 stop8h 02mUnited Airlines

Fri 10/311:20 pmSEA - FSD

2 stops8h 24mUnited Airlines

Deal found 7/28

$288

Tue 8/1212:47 pmFSD - SEA

1 stop9h 15mAmerican Airlines

Wed 8/2010:11 amSEA - FSD

1 stop8h 52mAmerican Airlines

Deal found 7/28

$379

Wed 8/273:07 pmFSD - SEA

1 stop9h 54mMultiple Airlines

Mon 9/112:59 amSEA - FSD

1 stop9h 18mMultiple Airlines

Deal found 7/26

$454

Best flights from Sioux Falls to Seattle
Discover carefully curated flight deals from Sioux Falls to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2025.

Thu 8/212:08 pmFSD - SEA

1 stop12h 26mFrontier

Fri 8/296:17 amSEA - FSD

1 stop5h 06mFrontier

Deal found 7/26

$238

Tue 9/1612:56 pmFSD - SEA

1 stop5h 33mDelta

Mon 9/2211:40 pmSEA - FSD

1 stop8h 27mDelta

Deal found 7/27

$269

Fri 10/249:30 amFSD - SEA

1 stop8h 02mUnited Airlines

Fri 10/311:20 pmSEA - FSD

2 stops8h 24mUnited Airlines

Deal found 7/28

$288

Tue 8/1212:47 pmFSD - SEA

1 stop9h 15mAmerican Airlines

Wed 8/2010:11 amSEA - FSD

1 stop8h 52mAmerican Airlines

Deal found 7/28

$379

Wed 8/273:07 pmFSD - SEA

1 stop9h 54mMultiple Airlines

Mon 9/112:59 amSEA - FSD

1 stop9h 18mMultiple Airlines

Deal found 7/26

$454

Last-minute flights from Sioux Falls to Seattle
Discover last-minute flight deals from Sioux Falls to Seattle. Data last updated July 29, 2025 and is based on user searches.

Mon 8/47:32 pmFSD - SEA

1 stop7h 02mFrontier

Wed 8/66:25 amSEA - FSD

1 stop10h 29mFrontier

Deal found 7/27

$318

Mon 8/46:49 pmFSD - SEA

1 stop6h 10mUnited Airlines

Wed 8/66:45 amSEA - FSD

2 stops13h 15mUnited Airlines

Deal found 7/27

$650

Mon 8/49:39 pmFSD - SEA

2 stops20h 46mMultiple Airlines

Wed 8/69:10 amSEA - FSD

3 stops30h 38mMultiple Airlines

Deal found 7/27

$674

Tue 8/55:11 pmFSD - SEA

1 stop9h 32mAmerican Airlines

Sat 8/912:46 amSEA - FSD

1 stop9h 31mAmerican Airlines

Deal found 7/27

$1,029

Tue 8/56:00 amFSD - SEA

2 stops10h 43mDelta

Sun 8/107:55 pmSEA - FSD

2 stops12h 22mDelta

Deal found 7/27

$1,896

Tue 8/1212:47 pmFSD - SEA

1 stop9h 15mAmerican Airlines

Wed 8/2010:11 amSEA - FSD

1 stop8h 52mAmerican Airlines

Deal found 7/28

$379

Thu 8/212:08 pmFSD - SEA

1 stop12h 26mFrontier

Fri 8/296:17 amSEA - FSD

1 stop5h 06mFrontier

Deal found 7/28

$238

Tue 8/265:00 amFSD - SEA

1 stop5h 48mDelta

Tue 9/211:55 pmSEA - FSD

1 stop8h 24mDelta

Deal found 7/28

$294

Tue 8/268:00 amFSD - SEA

2 stops9h 52mUnited Airlines

Tue 9/23:36 pmSEA - FSD

1 stop6h 04mUnited Airlines

Deal found 7/28

$336

Wed 8/273:07 pmFSD - SEA

1 stop9h 54mMultiple Airlines

Mon 9/112:59 amSEA - FSD

1 stop9h 18mMultiple Airlines

Deal found 7/26

$454

Fly from

Fly to

Route

Depart

Return

Price

Sioux FallsSeattle

FSD - SEA

FSDSEA

Sioux Falls Joe Foss Field

Thu 8/21

2:08 pm-12:34 am

1 stop12h 26m

Seattle/Tacoma Intl

Fri 8/29

6:17 am-1:23 pm

1 stop5h 06m

$238

Sioux FallsSeattle

FSD - SEA

FSDSEA

Sioux Falls Joe Foss Field

Tue 9/16

12:56 pm-4:29 pm

1 stop5h 33m

Seattle/Tacoma Intl

Mon 9/22

11:40 pm-10:07 am

1 stop8h 27m

$269

Sioux FallsSeattle

FSD - SEA

FSDSEA

Sioux Falls Joe Foss Field

Fri 10/24

9:30 am-3:32 pm

1 stop8h 02m

Seattle/Tacoma Intl

Fri 10/31

1:20 pm-11:44 pm

2 stops8h 24m

$288

Sioux FallsSeattle

FSD - SEA

FSDSEA

Sioux Falls Joe Foss Field

Tue 8/12

12:47 pm-8:02 pm

1 stop9h 15m

Seattle/Tacoma Intl

Wed 8/20

10:11 am-9:03 pm

1 stop8h 52m

$379

Sioux FallsSeattle

FSD - SEA

FSDSEA

Sioux Falls Joe Foss Field

Wed 8/27

3:07 pm-11:01 pm

1 stop9h 54m

Seattle/Tacoma Intl

Mon 9/1

12:59 am-12:17 pm

1 stop9h 18m

$454

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/26

Best time to book a flight from Sioux Falls to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Sioux Falls 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 Sioux Falls to Seattle

How far ahead should I book a flight from Sioux Falls to Seattle?

The price you pay for your flight from Sioux Falls to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 29 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from Sioux Falls to Seattle (average of $238). Flying from Sioux Falls to Seattle in June is currently the most expensive (average of $389). 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 FSD to SEA?

It’s optimal to fly from Sioux Falls to Seattle at noon. By choosing this option you can save up to 12% on the cost of your flight, compared to a flight in the morning.

How much does it cost to fly round-trip from Sioux Falls to Seattle?

What’s the top layover airport for flights from Sioux Falls to Seattle?

Denver (DEN) – chosen by Cheapflights users on 60% of 1-stop itineraries from Sioux Falls to Seattle on Cheapflights.

What’s the cheapest layover airport for flights from Sioux Falls to Seattle?

Denver (DEN) is the most affordable 1-stop option, with an average round-trip price of $312.

What’s the fastest layover option from Sioux Falls to Seattle?

Flights via Chicago (ORD) have the shortest average one-way travel time for 1-stop routes: 6h 07m.

Which airport typically offers the quickest layover for flights from Sioux Falls to Seattle?

Flights via Chicago (ORD) offer the fastest connection on this route, with an average layover time of 2h 07m.

Reviews of airlines servicing Seattle

Read through reviews of airlines operating flights from Sioux Falls to Seattle, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,979 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,979 reviews

Delta

8.0

Very good

7,979 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,896 reviews

Delta

8.0

Very good

7,979 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

7,979 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Frontier

5.9

Fair

3,238 reviews

Delta

8.0

Very good

7,979 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines flying from Sioux Falls to Seattle round-trip?
Our cheapest airline available from Sioux Falls to Seattle is Frontier. Our recent data shows that you can find tickets from as low as $238 on this airline. Additional options worth looking into are Delta and United Airlines, starting at $269 and $288 round-trip. These flights start at 48% lower than the current average price 3 months from now.
Can I find deals for flights from Sioux Falls to Seattle that include hotel bookings?
Yes. In addition to deals on Sioux Falls to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Sioux Falls to Seattle?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sioux Falls to Seattle.
Can I find deals for business class flights from Sioux Falls to Seattle?
Yes. Cheapflights offers flight deals from Sioux Falls 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.
What is the cheapest month to book a flight from Sioux Falls to Seattle?
Currently, January is the cheapest month in which you can book a flight from Sioux Falls to Seattle (average of $238). Flying from Sioux Falls to Seattle in June is currently the most expensive (average of $389). 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.

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Other flights to Seattle

Top 4 airlines flying from Sioux Falls to Seattle

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$139	Average$270	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$229	Average$438	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$268	Average$432	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$318	Average$596	FlexibilityNo cancel fee	On-time69%

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$238+ Cheap flights from Sioux Falls to Seattle (FSD - SEA)

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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Sioux Falls to Seattle with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Sioux Falls Joe Foss Field to Seattle/Tacoma Intl are usually found in July or October, booked 29 days in advance, depart on a Tuesday or Saturday and return on a Saturday

Cheap flight deals from Sioux Falls to Seattle

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from Sioux Falls to Seattle

Cheapest flights from Sioux Falls to SeattleExplore the most affordable flight options available from Sioux Falls to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Explore the most affordable flight options available from Sioux Falls to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Sioux Falls to Seattle that are best for you.

Best time to book a flight from Sioux Falls to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Sioux Falls with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Sioux Falls to Seattle

How far ahead should I book a flight from Sioux Falls to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from Sioux Falls to Seattle. Price data was last updated on July 25, 2025.

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

What is the cheapest time of day to fly from FSD to SEA?

Find hourly flight availability from Sioux Falls to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 29, 2025.

How much does it cost to fly round-trip from Sioux Falls to Seattle?

What’s the top layover airport for flights from Sioux Falls to Seattle?

Share of 1-stop round-trip flights from Sioux Falls to Seattle chosen by Cheapflights users in the past 12 months, using the same layover each way.

What’s the cheapest layover airport for flights from Sioux Falls to Seattle?

Average round-trip fare for 1-stop flights from Sioux Falls to Seattle, chosen by Cheapflights users in the past 12 months, with the same layover each way.

What’s the fastest layover option from Sioux Falls to Seattle?

Shortest average travel time for 1-stop one-way flights from Sioux Falls to Seattle, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Which airport typically offers the quickest layover for flights from Sioux Falls to Seattle?

Average layover duration for 1-stop one-way flights from Sioux Falls to Seattle, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Reviews of airlines servicing Seattle

Read through reviews of airlines operating flights from Sioux Falls to Seattle, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Sioux Falls to Seattle. 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 Sioux Falls to Seattle round-trip?

Can I find deals for flights from Sioux Falls to Seattle that include hotel bookings?

How can I find direct flights from Sioux Falls to Seattle?

Can I find deals for business class flights from Sioux Falls to Seattle?

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

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Alternative routes for Sioux Falls to Seattle

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Top 4 airlines flying from Sioux Falls to Seattle

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Cheapest flights from Sioux Falls to Seattle
Explore the most affordable flight options available from Sioux Falls to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.