$109 Cheap Flights to De Smet, SD

View $109 flight on Tue, Jul 29, 2025Opens in a new window

Popular airlines to De Smet

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How much is the cheapest flight to De Smet?

Prices were available within the past 7 days and start at $109 for one-way flights and $213 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

KEY LIME AIR DBA DENVER AIR CONNECTION
Mon, Jul 28 - Wed, Jul 30
ORD
Chicago
ATY
Watertown
$218 Roundtrip, found 1 day ago
$218
Roundtrip
found 1 day ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Mon, Jul 28 from Chicago to Watertown, returning Wed, Jul 30, priced at $218 found 1 day ago
KEY LIME AIR DBA DENVER AIR CONNECTION
Mon, Jul 28 - Thu, Jul 31
DEN
Denver
ATY
Watertown
$238 Roundtrip, found 4 days ago
$238
Roundtrip
found 4 days ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Mon, Jul 28 from Denver to Watertown, returning Thu, Jul 31, priced at $238 found 4 days ago
United
Sat, Aug 2 - Mon, Aug 4
DEN
Denver
ATY
Watertown
$240 Roundtrip, found 2 hours ago
$240
Roundtrip
found 2 hours ago
Select United flight, departing Sat, Aug 2 from Denver to Watertown, returning Mon, Aug 4, priced at $240 found 2 hours ago
Delta
Fri, Aug 15 - Sun, Aug 31
HSV
Huntsville
ATY
Watertown
$259 Roundtrip, found 19 hours ago
$259
Roundtrip
found 19 hours ago
Select Delta flight, departing Fri, Aug 15 from Huntsville to Watertown, returning Sun, Aug 31, priced at $259 found 19 hours ago
American Airlines
Tue, Jul 29 - Mon, Aug 4
DCA
Washington
ATY
Watertown
$620 Roundtrip, found 6 days ago
$620
Roundtrip
found 6 days ago
Select American Airlines flight, departing Tue, Jul 29 from Washington to Watertown, returning Mon, Aug 4, priced at $620 found 6 days ago

Alternative airports near De Smet

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Watertown Regional ATY. Cheapest option available. Average driving time to city center is 1 hour 32 minutes. Flights from $557
ATY
Watertown Regional
Cheapest
Average driving time to city center1 h 32 min
Flights from $557

Tips to find the cheapest flights to De Smet

The cheapest day to fly

Get started finding a cheap flight to De Smet on Expedia by either choosing a deal on this page or entering into the search bar your travel dates, origin airport, and whether you want roundtrip or one-way airfare. You can filter for flexibility, number of stops, airline, and departure/arrival times to find the best flight for you.

The cheapest month to fly

July is the cheapest month to fly to De Smet. This coincides with the low season when fewer people travel. Whichever month you travel in, though, be sure to book at least a month in advance if you want to score cheap tickets to De Smet. ARC's data shows that domestic flights booked 28 days or more before departure are typically 24% cheaper than those booked last minute.

The most affordable time to book a flight

Typically, a Sunday can be the cheapest time to book a flight to De Smet, according to ARC’s data. On average, you could save between 6% and 13% by booking on a Sunday instead of a Friday, which is the most expensive day to make a reservation.

The cheapest round-trip tickets to De Smet

The lowest price for round-trip flights to De Smet in 2025 starts from from $213, while one-way tickets start from from $109. Expedia's effective search tool is one of the best ways to find a budget airfare. Simply enter your dates, and within seconds, it'll show you a vast selection of the cheapest flights to De Smet. If you have a preferred departure time or airline, you can use the handy filters to customize your search.

The cheapest airlines flying to De Smet

KEY LIME AIR DBA DENVER AIR CONNECTION, Delta, American Airlines, United are just some of the airlines that can typically offer cheap tickets to De Smet. You can find their most affordable flights by using the “airline” search filter and then sorting prices from low to high. As a trusted partner of the world's leading airlines, Expedia offers you some of the best airfare deals to De Smet and countless more destinations worldwide.

The most affordable airports to fly into

To view the cheapest airports to fly into for De Smet, simply order your search results from lowest to highest price. Expedia's search tool compares flight prices for all airports close to your destination, so you don't have to manually search them one by one to find the cheapest flight to De Smet. If you have a preferred place to fly into, take advantage of the “arrival airport” filter to narrow down your search on Expedia.

Save with a package

With Expedia's amazing package deals, you could save hundreds of dollars by booking your De Smet plane tickets together with your accommodations, car rental, or activities. Just select the search wizard's “package” option to view some of the cheapest deals. Look out for the green savings label to see how much you're saving.

Date flexibility for the cheapest flights to De Smet

If you can be flexible with your travel dates, it's a good idea to broaden your search by comparing prices on different days. This will open up more options, meaning you could uncover a less expensive flight to De Smet.

Stopover savings

The cheapest tickets to De Smet are sometimes those with a stopover. Book one of these flights, and you'll change planes at an airport en route to De Smet. While the overall travel time might be longer than a non-stop flight, you may decide it's worth it for the money saved.

Get Expedia's Price Drop Protection

Price Drop Protection means that if your flight gets cheaper after booking, you'll be credited the difference*. This gives you peace of mind that you're getting one of the cheapest flights to De Smet for your chosen departure. Expedia's Price Drop Protection is available for a small fee but is free to One Key Gold and Platinum tier members.

*Terms apply.

Use our Price Tracking feature

Expedia's Price Tracking feature is another great tool that removes the guesswork from finding cheap flights to De Smet. Simply download the free Expedia app to your smart device and activate De Smet flight price alerts for your travel dates. There's even a price predictor tool that uses historical data to indicate the best time to book, giving you peace of mind that you'll nab the lowest prices.

Book with Expedia

As well as Price Drop Protection and Price Tracking, Expedia's close partnership with a vast selection of the world's leading airlines means you're sure to find cheap flights to De Smet. Plus, the One Key rewards program lets you earn real cash rewards on most bookings that you can use to save money on future trips. Best of all, it's free to join, and members often unlock exclusive discounts, too.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

What month is the cheapest to fly to De Smet?
October is typically the least expensive month for flights to De Smet*. Keep an eye out for cheap fares during this time as you might score a good deal. *Cheapest month to fly is based on the month with the cheapest flight found on Expedia.com in the next 330 days.
Which US cities have the cheapest flights to De Smet?
Land cheap flights to De Smet from Chicago, Denver and Minneapolis - St. Paul. These cities typically offer the lowest fares to this unique destination. But bear in mind that holiday periods, demand and stopovers will also influence rates, so stay flexible and book when prices are right.
Which US cities fly direct to De Smet?
There are 10 US destinations that you can fly to De Smet directly from. Explore the options by using the "Direct flights only" filter on Expedia and find the ideal departure point for you. Here are some of the leading cities to head out from:

  • Chicago
  • Denver
  • Minneapolis - St. Paul
  • Dallas
  • Phoenix

How to find a cheap flight to De Smet?
Book your trip early for the best chance of scoring cheap flights to De Smet. Also, consider visiting during off-season months like January and February. If you jet off on a Thursday, you can save 16% on average compared to departing on a Sunday.* Save time checking every day and create a price alert on the Expedia app. We'll let you know when fares change.*Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.
How to get a cheap last-minute flight to De Smet?
It's possible to get great deals on last-minute departures to De Smet, especially if your travel plans aren't set in stone. Think about leaving from a different hub, changing your trip dates or choosing an alternative carrier to get a cheap flight to De Smet.
How far in advance should I book a flight to De Smet?
Secure your flight to De Smet two to four months ahead if you're jetting in from an international destination. For domestic travel, the general guideline is 28 days in advance. Cheaper fares and a greater choice of departure dates, schedules and seating options are just some of the advantages of booking early.**Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.
Which day of the week is the cheapest day to buy a plane ticket to De Smet?
You'll save an average of 8% if you buy plane tickets on a Sunday instead of Fridays, which tend to be the priciest day to book.* When it comes to scoring a cheap flight to De Smet, the key is good timing.*Best day of the week to book, depart and ideal booking window recommendations based on average round-trip ticket prices for January through August 2023, sourced from Airline Reporting Corporation's (ARC) global airline sales database. Percentages noted are averages.
Which airlines fly to De Smet?
With a good range of airlines flying to De Smet, you won't be short of options:

  • United Airlines - 386 flights to De Smet each month, including 212 flights to Sioux Falls Regional Airport (FSD) per month.
  • American Airlines - 251 flights to De Smet each month, including 182 flights to Sioux Falls Regional Airport (FSD) per month.
  • Delta Air Lines - 234 flights to De Smet each month, including 147 flights to Sioux Falls Regional Airport (FSD) per month.

Where do you fly into De Smet?
When flying to De Smet, the main airport to arrive at is Huron, SD (HON-Huron Regional). You can also head to nearby hubs like Watertown Regional Airport (ATY), Madison, SD (XMD-Madison Municipal) or Brookings, SD (BKX-Brookings Regional). Another option to think about when you fly to De Smet is Mitchell, SD (MHE-Mitchell Municipal).
How far is the airport from central De Smet?
Flying into Huron, SD (HON-Huron Regional) puts you about 35 mi west of the center of De Smet.
Can I save money by booking a De Smet trip package?
Bundle your flights and accommodations and you could save hundreds of dollars. What's more, you can add extras like tours and car rentals to your De Smet flight and hotel package deal. With Expedia, it's a breeze to book all your De Smet travel arrangements in one place.
Can I change or cancel my flight to De Smet?
You can often cancel or change your flight to De Smet within 24 hours of booking. However, be mindful that some fares are non-refundable. In those cases, you may receive credit for future flights instead of a direct refund. Be sure to check the airline's terms of service in your itinerary for specific details. You can use Expedia's "Changes included" or "No cancel fee" filters when you search to secure cheap flights to De Smet with flexible change policies. For additional information, head to our Customer Service Portal.
Flights to De Smet information
Destination airport
Watertown Regional
Destination airport IATA code
ATY
Destination city name
Watertown
Roundtrip price
$233

Trending flights to De Smet

Prices were available within the past 7 days and start at $109 for one-way flights and $213 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

KEY LIME AIR DBA DENVER AIR CONNECTION
Mon, Jul 28 - Mon, Jul 28
ORD
Chicago
ATY
Watertown
$213 Roundtrip, found 1 day ago
$213
Roundtrip
found 1 day ago
Select KEY LIME AIR DBA DENVER AIR CONNECTION flight, departing Mon, Jul 28 from Chicago to Watertown, returning Mon, Jul 28, priced at $213 found 1 day ago

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*Available to One Key members.