$187 Cheap Delta flights Washington (IAD) to Sioux Falls (FSD)

Set the “Price (lowest to highest)” filter on Expedia to search for cheap Delta Air Lines return flights from $373 from IAD to FSD. Affordable one-way fares from $187 are available too.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Delta Air Lines flights to Sioux Falls are typically cheaper in the off-peak months of January and December. Whether you’re searching for a return or one-way ticket, you could land a better deal then.

Look for affordable Delta Air Lines flights from Washington Dulles Intl. Airport (IAD) to Sioux Falls Regional Airport (FSD) one to three months prior to your departure day. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare type and journey, the ideal day to book a domestic flight is generally Sunday and the most expensive tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

To find out if there’s a direct route from IAD to FSD with Delta Air Lines or other carriers, select the “Nonstop” filter when browsing for flights.

To find the earliest departures from IAD to FSD with Delta Air Lines, filter your search by “Early Morning” and “Morning.” Booking an early flight usually means you’re less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Delta Air Lines flights from Washington Dulles Intl. Airport (IAD) to Sioux Falls land at Sioux Falls Regional Airport (FSD). This is the main gateway here.

Offering an excellent in-flight experience and a rewarding loyalty program, Delta Air Lines is the leading choice for many passengers flying from IAD to FSD. What’s more, if you’re a Delta SkyMiles and One Key™ member booking with Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles, which can go toward future travel.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

Depending on the type of ticket you purchased, a fee typically applies if you change or cancel your booking more than 24 hours after it’s confirmed. To secure flexible plane tickets, select our “Changes included” and “No cancel fee” boxes while searching for flights. For more information on changing or canceling your reservation, head to “Trips,” select your flight and click on “Manage Booking.”