$334+ Cheap flights from Reagan-National (DCA) to Sioux City (SUX)
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 11/6. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — SUX
Nov 4 — Nov 111
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Reagan-National to Sioux City with Cheapflights
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
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 October 5, 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 October 5, 2026.
This United Airlines deal was found by Cheapflights users on 10/2. 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.
Fri 11/61:06 pm -
1 stop6h 04m
Sun 11/86:00 am -
1 stop7h 12m
Deal found 10/2![United Airlines logo]()
$334
This United Airlines deal was found by Cheapflights users on 10/4. 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.
Wed 12/1611:54 am -
1 stop7h 11m
Sun 1/38:15 am -
1 stop6h 19m
Deal found 10/4![United Airlines logo]()
$398
This United Airlines deal was found by Cheapflights users on 10/1. 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 10/191:15 pm -
1 stop5h 38m
Mon 10/266:00 am -
1 stop6h 14m
Deal found 10/1![United Airlines logo]()
$469
This United Airlines deal was found by Cheapflights users on 10/1. 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.
Sat 10/317:00 am -
2 stops12h 10m
Sat 11/76:00 am -
1 stop7h 12m
Deal found 10/1![United Airlines logo]()
$597
This United Airlines deal was found by Cheapflights users on 10/4. 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 10/194:18 pm -
1 stop8h 25m
Fri 10/238:35 am -
1 stop4h 48m
Deal found 10/4![United Airlines logo]()
$772
This United Airlines deal was found by Cheapflights users on 10/4. 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 10/152:05 pm -
1 stop4h 48m
Sun 10/188:35 am -
1 stop7h 33m
Deal found 10/4![United Airlines logo]()
$773
This United Airlines deal was found by Cheapflights users on 10/5. 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.
Fri 10/161:15 pm -
1 stop5h 38m
Sun 10/188:35 am -
1 stop7h 33m
Deal found 10/5![United Airlines logo]()
$798
This United Airlines deal was found by Cheapflights users on 10/1. 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.
Fri 10/164:18 pm -
1 stop8h 25m
Tue 10/208:35 am -
1 stop4h 48m
Deal found 10/1![United Airlines logo]()
$799
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 October 5, 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 October 5, 2026.
This United Airlines deal was found by Cheapflights users on 10/2. 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.
Fri 11/61:06 pm -
1 stop6h 04m
Sun 11/86:00 am -
1 stop7h 12m
Deal found 10/2![United Airlines logo]()
$334
This United Airlines deal was found by Cheapflights users on 10/4. 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 10/194:18 pm -
1 stop8h 25m
Fri 10/238:35 am -
1 stop4h 48m
Deal found 10/4![United Airlines logo]()
$772
This United Airlines deal was found by Cheapflights users on 10/1. 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 10/191:15 pm -
1 stop5h 38m
Mon 10/266:00 am -
2 stops11h 43m
Deal found 10/1![United Airlines logo]()
$782
This United Airlines deal was found by Cheapflights users on 10/5. 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.
Fri 10/161:15 pm -
1 stop5h 38m
Sun 10/188:35 am -
1 stop7h 33m
Deal found 10/5![United Airlines logo]()
$798
This United Airlines deal was found by Cheapflights users on 10/1. 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.
Sun 11/224:09 pm -
1 stop8h 34m
Mon 11/306:45 pm -
2 stops24h 26m
Deal found 10/1![United Airlines logo]()
$956
This United Airlines deal was found by Cheapflights users on 10/1. 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.
Sun 10/111:15 pm -
1 stop5h 38m
Tue 10/138:35 am -
1 stop4h 48m
Deal found 10/1![United Airlines logo]()
$962
Last-minute flights from Reagan-National to Sioux CityDiscover last-minute flight deals from Reagan-National to Sioux City. Data last updated October 5, 2026 and is based on user searches.
Discover last-minute flight deals from Reagan-National to Sioux City. Data last updated October 5, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 10/4. 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 10/152:05 pm -
1 stop4h 48m
Sun 10/188:35 am -
1 stop7h 33m
Deal found 10/4![United Airlines logo]()
$773
This United Airlines deal was found by Cheapflights users on 10/5. 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.
Fri 10/161:15 pm -
1 stop5h 38m
Sun 10/188:35 am -
1 stop7h 33m
Deal found 10/5![United Airlines logo]()
$798
This United Airlines deal was found by Cheapflights users on 10/1. 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.
Fri 10/164:18 pm -
1 stop8h 25m
Tue 10/208:35 am -
1 stop4h 48m
Deal found 10/1![United Airlines logo]()
$799
This United Airlines deal was found by Cheapflights users on 10/1. 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 10/191:15 pm -
1 stop5h 38m
Mon 10/266:00 am -
1 stop6h 14m
Deal found 10/1![United Airlines logo]()
$469
This United Airlines deal was found by Cheapflights users on 10/4. 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 10/194:18 pm -
1 stop8h 25m
Fri 10/238:35 am -
1 stop4h 48m
Deal found 10/4![United Airlines logo]()
$772
This United Airlines deal was found by Cheapflights users on 10/1. 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.
Sat 10/317:00 am -
2 stops12h 10m
Sat 11/76:00 am -
1 stop7h 12m
Deal found 10/1![United Airlines logo]()
$597
This United Airlines deal was found by Cheapflights users on 10/2. 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.
Fri 11/61:06 pm -
1 stop6h 04m
Sun 11/86:00 am -
1 stop7h 12m
Deal found 10/2![United Airlines logo]()
$334
This United Airlines deal was found by Cheapflights users on 10/1. 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.
Sun 11/224:09 pm -
1 stop8h 34m
Mon 11/306:45 pm -
2 stops24h 26m
Deal found 10/1![United Airlines logo]()
$956
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 October 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $334 (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 October 5, 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
Washington, D.C.Sioux City
DCA Washington, D.C. Reagan-National - SUX Sioux City Sioux Gateway
DCASUX
Washington, D.C. Reagan-National
Fri 11/6
1:06 pm-6:10 pm
1 stop6h 04m
Sioux City Sioux Gateway
Sun 11/8
6:00 am-2:12 pm
1 stop7h 12m
$334
Washington, D.C.Sioux City
DCA Washington, D.C. Reagan-National - SUX Sioux City Sioux Gateway
DCASUX
Washington, D.C. Reagan-National
Mon 10/19
4:18 pm-11:43 pm
1 stop8h 25m
Sioux City Sioux Gateway
Fri 10/23
8:35 am-2:23 pm
1 stop4h 48m
$772
Washington, D.C.Sioux City
DCA Washington, D.C. Reagan-National - SUX Sioux City Sioux Gateway
DCASUX
Washington, D.C. Reagan-National
Mon 10/19
1:15 pm-5:53 pm
1 stop5h 38m
Sioux City Sioux Gateway
Mon 10/26
6:00 am-6:43 pm
2 stops11h 43m
$782
Washington, D.C.Sioux City
DCA Washington, D.C. Reagan-National - SUX Sioux City Sioux Gateway
DCASUX
Washington, D.C. Reagan-National
Fri 10/16
1:15 pm-5:53 pm
1 stop5h 38m
Sioux City Sioux Gateway
Sun 10/18
8:35 am-5:08 pm
1 stop7h 33m
$798
Washington, D.C.Sioux City
DCA Washington, D.C. Reagan-National - SUX Sioux City Sioux Gateway
DCASUX
Washington, D.C. Reagan-National
Sun 11/22
4:09 pm-11:43 pm
1 stop8h 34m
Sioux City Sioux Gateway
Mon 11/30
6:45 pm-8:11 pm
2 stops24h 26m
$956
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
Sun 10/11
1:15 pm-5:53 pm
1 stop5h 38m
Sioux City Sioux Gateway
Tue 10/13
8:35 am-2:23 pm
1 stop4h 48m
$962
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from Reagan-National
Popular flights
Sioux City flight routes