SEA - FSD

$139 Find Cheap Flights from Seattle to Sioux Falls

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Sioux Falls departing on 11/13. 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.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Sioux Falls

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Sioux Falls, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Sioux Falls, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$139
Overall average: $351
Frontier
Thu 11/13Mon 11/17
SEA - FSD • 1 stop
Cheapest one-way
$295
Typical prices: $283-$760
American Airlines
Thu 12/18
SEA - FSD • 1 stop
Top airlines
Frontier
Cheapest • from $139 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 27% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
November
Cheapest • 23% price drop
September
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Sioux Falls (SEA-FSD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Sioux Falls that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Sioux Falls

Thu, Nov 13 - Mon, Nov 17
Frontier Logo
12:58 pm - 1:42 pmSEA-FSD
22h 44m1 stop
Frontier Logo
2:32 pm - 12:07 pmFSD-SEA
23h 35m1 stop
$139Frontier
Find Deal
Thu, Nov 13 - Mon, Nov 17
Frontier Logo
8:22 pm - 1:42 pmSEA-FSD
15h 20m2 stops
Frontier Logo
2:32 pm - 12:07 pmFSD-SEA
23h 35m1 stop
$227Frontier
Find Deal
Fri, Dec 5 - Mon, Dec 8
American Airlines Logo
12:38 am - 11:06 amSEA-FSD
8h 28m1 stop
American Airlines Logo
8:05 am - 2:05 pmFSD-SEA
8h 00m1 stop
$269American Airlines
Find Deal
Tue, Mar 31 - Wed, Apr 15
Delta Logo
3:35 pm - 10:58 pmSEA-FSD
5h 23m1 stop
Delta Logo
1:20 pm - 8:24 pmFSD-SEA
9h 04m1 stop
$294Delta
Find Deal
Tue, Mar 31 - Wed, Apr 15
Delta Logo
3:35 pm - 10:58 pmSEA-FSD
5h 23m1 stop
Delta Logo
5:15 am - 10:45 amFSD-SEA
7h 30m1 stop
$324Delta
Find Deal
Thu, Dec 18 - Wed, Jan 7
American Airlines Logo
3:00 pm - 11:39 pmSEA-FSD
6h 39m1 stop
American Airlines Logo
2:25 pm - 8:35 pmFSD-SEA
8h 10m1 stop
$329American Airlines
Find Deal
Sat, Dec 6 - Mon, Dec 8
United Airlines Logo
9:25 am - 11:43 pmSEA-FSD
12h 18m2 stops
United Airlines Logo
5:21 pm - 9:46 pmFSD-SEA
6h 25m1 stop
$354United Airlines
Find Deal
Tue, Nov 11 - Tue, Nov 18
United Airlines Logo
8:36 am - 9:46 pmSEA-FSD
11h 10m2 stops
United Airlines Logo
5:14 pm - 9:33 pmFSD-SEA
6h 19m1 stop
$379United Airlines
Find Deal
Tue, Mar 31 - Fri, Apr 17
Alaska Airlines Logo
11:45 am - 10:14 pmSEA-FSD
8h 29m1 stop
Alaska Airlines Logo
4:20 pm - 9:34 pmFSD-SEA
7h 14m1 stop
$419Alaska Airlines
Find Deal
Tue, Mar 31 - Mon, Apr 13
Alaska Airlines Logo
11:45 am - 10:14 pmSEA-FSD
8h 29m1 stop
Alaska Airlines Logo
4:20 pm - 9:34 pmFSD-SEA
7h 14m1 stop
$444Alaska Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Seattle to Sioux Falls flights

Get data-powered insights and trends into flights from Seattle to Sioux Falls to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Seattle to Sioux Falls?

The average price of all round-trip flights from Seattle to Sioux Falls clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to Sioux Falls on a Saturday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Seattle to Sioux Falls. For your return ticket, we recommend flying on a Tuesday and avoiding Sundays for the best deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Sioux Falls, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Seattle to Sioux Falls is November, where tickets cost $351 (return) on average. On the other hand, the most expensive months are April and December, where the average cost of round-trip tickets is $574 and $552 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Sioux Falls, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Seattle to Sioux Falls, you should book around 3 weeks before departure, which saves you about 27% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know

Low seasonMarch
Cheapest flight$139
Best time to beat the crowds but there is an average 17% increase in price.
Most popular time to fly and prices are also 16% lower on average.
Flight from Seattle to Sioux Falls

When to book flights from Seattle to Sioux Falls

Are your dates flexible? Find out the best times to travel from Seattle to Sioux Falls based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Sioux Falls

  • What is the baggage allowance for flights from Seattle to Sioux Falls?

    Baggage allowance varies depending on the airline and fare type you choose. All passengers on American Airlines, regardless of the fare type, can bring a personal item and carry-on free of charge. Checked bags of up to 50 lbs will cost extra unless you upgrade to Business class. When checking bags, we suggest prepaying for them to save time and money at the airport.

  • Which airlines flying from Seattle to Sioux Falls are family-friendly?

    Frontier Airlines has several programs to cater to families when booking. The Works bundle is great for families looking for flexibility with their travel plans. With this plan, you can select your seat, board first, and change your flight with no fee. Families can take advantage of priority boarding at the airport and onboard, kids can collect trading cards and get their own flight certificate signed by the crew.

  • Which airline is recommended for people with special needs?

    Delta, United, and American Airlines all provide wheelchair assistance for passengers with limited mobility. With Delta, you can arrange a wheelchair and have it waiting when you arrive at the airport. They also have special aisle chairs that can be used for getting around the aircraft, boarding, and deplaning. Delta also offers services for those with limited sight or hearing. All services can be arranged after booking using the Accessibility Service Request form at least 48 hours before the flight.

  • Which is the most sustainable way to fly from Seattle to Sioux Falls?

    Eco-minded travelers might enjoy the initiatives Frontier is taking to be more green. In their flights and operations, they have programs to protect the environment. They operate the youngest fleet in the industry, which has helped them to save 43% in fuel emissions. On the aircraft, they’ve introduced lighter seats and biodegradable cups.

  • What is the cheapest flight from Seattle to Sioux Falls?

    In the last 3 days, the lowest price for a flight from Seattle to Sioux Falls was $295 for a one-way ticket and $139 for a round-trip.

  • Do I need a passport to fly between Seattle and Sioux Falls?

    No, a passport isn't needed to fly from Seattle to Sioux Falls. However, local authorities might ask for an official ID.

  • Which aircraft models fly most regularly from Seattle to Sioux Falls?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Sioux Falls?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Seattle and Sioux Falls, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from Seattle to Sioux Falls, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Seattle to Sioux Falls are Delta and United Airlines. With an average price for the route of $447 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $531 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Seattle to Sioux Falls?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Sioux Falls.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Sioux Falls?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sioux Falls from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Sioux Falls?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Sioux Falls with an airline and back to Seattle with another airline. Booking your flights between Seattle and FSD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Sioux Falls?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sioux Falls from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Seattle to Sioux Falls

  • While there are no direct flights from Seattle (SEA) to Sioux Falls (FSD), most flights have just one layover. Denver (DEN), Minneapolis (MSP), and Dallas, (DFW) are the most common cities where you might stop along this route.
  • Frontier is a budget airline with low fares, which means all extra services will have a separate charge. However, they offer different packages and bundles that combine services to save you money.
  • Passengers on Delta Air Lines should consider joining the SkyMiles rewards program. All SkyMiles members can enjoy free Wi-Fi during their flights. You can earn miles each time you fly in the Main Cabin or above.
  • The Basic Economy fare on Delta is a good option for budget travelers who aren’t bringing a lot of luggage. One personal item and a carry-on bag are allowed free of charge. Any other services like seat selection and priority boarding will cost extra.
  • You will arrive at Sioux Falls Regional Airport (FSD) which is located just a few miles north of the city. There is no public transportation, but you will find plenty of taxis and ride-share services to take you where you need to go.

Reviews of the top 4 airlines serving from Seattle to Sioux Falls

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Sioux Falls. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Sioux Falls? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 7992 reviews
8.2Boarding
7.9Comfort
8.5Crew
7.3Food
7.9Entertainment
Airline reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

8.0 ExcellentJulie, Oct 2025LAX - SFO
Read more Delta reviews

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Non stop on long haul is the way to go. Great experience

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

Flight was crowded and the woman sitting on my left was large & kept crouching in to my space. You need bigger seats or smaller passengers to fit into the seats you DO have! Snack were OK. Would appreciate if airlines had more savory rather than sweet snacks, thank you!

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

We were delayed, which I think had to do with air traffic control. Otherwise, everything was great.

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

The person I bought the ticket for didn’t make the flight.

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Another delayed flight. When the delays exceed the duration of the flight, it’s a problem.

Excellent flight. Smooth, efficient boarding. Quick flight. Arrived early at STL.

After boarding the plane in Chicago, the passengers were told that there was a technical problem with the plane. Passengers remained on the plane as they tried to fix the problem. After what was probably an hour passengers were told that there was a need to change planes as the problem was not solved. Passengers disembarked and boarded another plane. After taxing to the runway and waiting for takeoff, passengers were told that owing to the thunderstorm the flight was unable to take off but would try and reroute. After some time passengers were told there wasn't enough fuel for the new route and the plane had to return to the gate for additional fuel. after another log delay the flight got underway. On the plane there was food, drinks, ice or entertainment. We were a glass of water, which appeared rationed. Flight arrived about 5 hours late. The pilot was fantastic and communicated with the passengers throughout the ordeal.

The flight attendants were great, I joked with one I can’t remember her name, a blond, really sweet. I thought it was run well very professional. This was great i survived Spirit, I know for which I speak.

During booking, I kept trying submitting my payment from the Mexican website and it didn't work. After I had the idea to change it to the Canadian website, it worked but I had to be charged the equivalent of 50 CAD more. I received the clear instruction that I would only be able to check-in at the airport and that it was impossible to select a seat 24 hours before departure, that I had to pay 144 CAD to do so, although not only was I able to check-in 24 hours before departure, but I could have selected my seats for free then. All in all, I almost threw $200 out the window due to misleading information. Besides, the app kept crashing, the information to get to the gate on the app was inaccurate, my gate was switched and I was only informed once in the air (luckily I had noticed the departure pannel), I was not addressed in my language beforehand and even if I tried I was immediately answered in English (which meant the crew understood but didn't want to answer accordingly), there was only one snack & beverage service on my medium haul flight and no beverage service on my short haul flight. To be fair, the planes were comfortable, the crew apart from the language issue was helpful, dynamic and engaging, the plane was clean and the directions were clear and direct. United has a lot of potential to be one of my favourite airlines, but the devil is in the details and a lot of them missed the target.

Flight was timely, relatively comfortable, with decent entertainment and food served. Only problem encountered was with the free messaging which I highly appreciate, but it did not work from iphone to non-iphones.

Better WiFi. I cannot understand that in 2025, United is so behind on a technology that is now a necessity and still painfully unreliable, slow and keeps disconnecting.

The flight attendant, a black woman with curly hair who sat near Row 21, was wonderful and kind.

It was good..clean, comfy seat. Friendly warm welcoming crew. Was able to check my cabin luggage at the gate which I was able to pickup in a decent time from baggage claim. The app gave all updates from delays to baggage claim info. Overall smooth flight.

Flight was delayed leaving Dallas. Arrived about 2 hours later than scheduled.

Flight delayed and missed connection. Rescheduled flight cancelled after 6 hrs wait. Rerouted thru ORD, flight cancelled, overnight stay in ORD. Still in the air on new flight!

We are too tired and frustrated to comment politely at this point

Terrible. Our luggage was delayed and couldn’t be delivered for several days. We got bad information from the airline agents at baggage claim. We had to pick up our car so we wouldn’t be charged for an extra day. We got lost in the maze of airport parking. The baggage claim agents didn’t offer us any compensation for our extra time and expense. We are tired, hungry and very frustrated.

The flight was flawless and we even arrived between 20 and 25 minutes early!

The only thing to like was that we eventually got to our destination

Delayed delayed delayed and no offer for food or vouchers

Typically flights with AA are good. The staff are pleasant, welcoming, and efficient.

Terrible. The canceled my entire flight when I requested a refund for a trip frontier canceled trip one way.

Boarding was on time and plane departed as scheduled. There are obviously no amenities (food, drink, entertainment) on Frontier, but there also didn't seem to be any issues with luggage space either.

Inbound plane was on time and flight departed on time with no issues while boarding.

I knew going into this that Frontier, being a low cost carrier, would be pretty bare bones and charge for most extras but this was made up for by the fact that the airplane was a reasonably new Airbus, every employee was great and best of all, Everett Washington is an amazing airport - thanks Frontier for flying there!!!

i was unable to check in the flight. refund requested

It was well done. It was my first time flying with them and I was nervous b/c I have heard of many cancelled and/or delray flights. Everything went smoothly.

Just know that everything, and I mean everything is “ala cart”. 60$ just to put something in the overhead bin. I will never fly Frontier again nor do I recommend them to anyone else.

The single worst check in experience I could imagine. I’ll never do any business with Frontier or any affiliated company

Too many extra fees, uncomfortable, little leg room. Will not recommend this airline.

Everyone seemed to be in zone 1 for boarding. Maybe break it up a little. Otherwise, smooth flight.

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

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