$259+ Cheap flights from Reagan-National (DCA) to Sioux City (SUX)
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 9/24. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — SUX
Sep 20 — Sep 271
Round-trip
1 adult, Economy
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1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Reagan-National to Sioux City
Cheapest
Best
Last-minute
One-way
Cheapest flights from Reagan-National to Sioux CityExplore the most affordable flight options available from Reagan-National to Sioux City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 21, 2026.
Explore the most affordable flight options available from Reagan-National to Sioux City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 21, 2026.
This deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2611:57 am -
1 stop6h 56m
Sun 8/308:10 am -
1 stop5h 13m
Deal found 8/16![United Airlines logo]()
$499
This deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/282:00 pm -
1 stop4h 53m
Tue 9/19:05 am -
1 stop5h 37m
Deal found 8/16![United Airlines logo]()
$579
This deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/262:00 pm -
1 stop4h 53m
Sat 8/299:05 am -
1 stop6h 57m
Deal found 8/16![United Airlines logo]()
$624
This United Airlines deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/312:00 pm -
1 stop4h 53m
Fri 9/46:43 pm -
1 stop19h 20m
Deal found 8/16![United Airlines logo]()
$641
This deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/272:00 pm -
1 stop4h 53m
Sat 8/299:05 am -
1 stop6h 57m
Deal found 8/16![United Airlines logo]()
$705
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2011:30 am -
2 stops13h 13m
Mon 8/248:10 am -
1 stop5h 13m
Deal found 8/18![United Airlines logo]()
$978
This United Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/310:30 am -
1 stop8h 23m
Mon 9/78:10 am -
1 stop8h 59m
Deal found 8/19![United Airlines logo]()
$1,090
Best flights from Reagan-National to Sioux CityDiscover carefully curated flight deals from Reagan-National to Sioux City that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 21, 2026.
Discover carefully curated flight deals from Reagan-National to Sioux City that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 21, 2026.
This deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/282:00 pm -
1 stop4h 53m
Tue 9/19:05 am -
1 stop5h 37m
Deal found 8/16![United Airlines logo]()
$579
This deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2711:57 am -
1 stop6h 56m
Sun 8/308:10 am -
1 stop5h 13m
Deal found 8/16![United Airlines logo]()
$579
This United Airlines deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/312:00 pm -
1 stop4h 53m
Fri 9/46:43 pm -
1 stop19h 20m
Deal found 8/16![United Airlines logo]()
$641
This United Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/310:30 am -
1 stop8h 23m
Mon 9/78:10 am -
1 stop8h 59m
Deal found 8/19![United Airlines logo]()
$1,090
Last-minute flights from Reagan-National to Sioux CityDiscover last-minute flight deals from Reagan-National to Sioux City. Data last updated August 21, 2026 and is based on user searches.
Discover last-minute flight deals from Reagan-National to Sioux City. Data last updated August 21, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 8/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2011:30 am -
2 stops13h 13m
Mon 8/248:10 am -
1 stop5h 13m
Deal found 8/18![United Airlines logo]()
$978
This deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2611:57 am -
1 stop6h 56m
Sun 8/308:10 am -
1 stop5h 13m
Deal found 8/16![United Airlines logo]()
$499
This deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/262:00 pm -
1 stop4h 53m
Sat 8/299:05 am -
1 stop6h 57m
Deal found 8/16![United Airlines logo]()
$624
This deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/272:00 pm -
1 stop4h 53m
Sat 8/299:05 am -
1 stop6h 57m
Deal found 8/16![United Airlines logo]()
$705
This deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/282:00 pm -
1 stop4h 53m
Tue 9/19:05 am -
1 stop5h 37m
Deal found 8/16![United Airlines logo]()
$579
This United Airlines deal was found by Cheapflights users on 8/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/312:00 pm -
1 stop4h 53m
Fri 9/46:43 pm -
1 stop19h 20m
Deal found 8/16![United Airlines logo]()
$641
This United Airlines deal was found by Cheapflights users on 8/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/310:30 am -
1 stop8h 23m
Mon 9/78:10 am -
1 stop8h 59m
Deal found 8/19![United Airlines logo]()
$1,090
One-way flights from Reagan-National to Sioux CitySearch for one-way flight options from Reagan-National to Sioux City. Find affordable one-way fares based on user searches. Data last updated August 21, 2026.
Search for one-way flight options from Reagan-National to Sioux City. Find affordable one-way fares based on user searches. Data last updated August 21, 2026.
This United Airlines deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2411:57 am -
1 stop6h 56m
Deal found 8/20![United Airlines logo]()
$259
This United Airlines deal was found by Cheapflights users on 8/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/283:30 pm -
1 stop27h 23m
Deal found 8/20![United Airlines logo]()
$300
Find flight deals from Reagan-National to Sioux City
Discover tips and strategies to find the most affordable flight options for your journey from Reagan-National (DCA) to Sioux City (SUX). 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 August 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $404 (United Airlines) |
One-way from | $259 (United Airlines) |
Cheapflights Fare Finder
Customize your flight search to find flights from Reagan-National to Sioux City 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 7,457,451 searches. Data last updated August 21, 2026.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Sioux City that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
Washington, D.C.Sioux City
DCA Washington, D.C. Reagan-National - SUX Sioux City Sioux Gateway
DCASUX
Washington, D.C. Reagan-National
Fri 8/28
2:00 pm-5:53 pm
1 stop4h 53m
Sioux City Sioux Gateway
Tue 9/1
9:05 am-3:42 pm
1 stop5h 37m
$579
Washington, D.C.Sioux City
DCA Washington, D.C. Reagan-National - SUX Sioux City Sioux Gateway
DCASUX
Washington, D.C. Reagan-National
Thu 8/27
11:57 am-5:53 pm
1 stop6h 56m
Sioux City Sioux Gateway
Sun 8/30
8:10 am-2:23 pm
1 stop5h 13m
$579
Washington, D.C.Sioux City
DCA Washington, D.C. Reagan-National - SUX Sioux City Sioux Gateway
DCASUX
Washington, D.C. Reagan-National
Mon 8/31
2:00 pm-5:53 pm
1 stop4h 53m
Sioux City Sioux Gateway
Fri 9/4
6:43 pm-3:03 pm
1 stop19h 20m
$641
Washington, D.C.Sioux City
DCA Washington, D.C. Reagan-National - SUX Sioux City Sioux Gateway
DCASUX
Washington, D.C. Reagan-National
Thu 9/3
10:30 am-5:53 pm
1 stop8h 23m
Sioux City Sioux Gateway
Mon 9/7
8:10 am-6:09 pm
1 stop8h 59m
$1,090
Cheapest one-way
Quickest one-way
Washington, D.C.Sioux City
DCA Washington, D.C. Reagan-National - SUX Sioux City Sioux Gateway
DCASUX
Washington, D.C. Reagan-National
Thu 9/24
11:57 am-5:53 pm
1 stop6h 56m
$259
Washington, D.C.Sioux City
DCA Washington, D.C. Reagan-National - SUX Sioux City Sioux Gateway
DCASUX
Washington, D.C. Reagan-National
Mon 9/28
6:12 pm-11:43 pm
2 stops30h 31m
$678
Sorted by cheapest first
- Most accurate provider: When it comes to deals on Washington, D.C. Reagan-National Airport-Sioux City flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Reagan-National Airport-Sioux City flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Reagan-National Airport-Sioux City flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Washington, D.C. Reagan-National Airport-Sioux City flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Reagan-National Airport-Sioux City flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Reagan-National to Sioux City
Have a flexible travel schedule? Discover the best time to fly to Sioux City from Reagan-National with our price prediction graph.
DCA-SUX
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.
Related info for your journey
Find useful and relevant information for your journey from Reagan-National to Sioux City. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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