$726+ Cheap flights from Rapid City to Decatur, IL (RAP - DEC)
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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — DEC
Oct 22 — Oct 291
Round-trip
1 adult, Economy
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Cheapest flights from Rapid City to DecaturExplore the most affordable flight options available from Rapid City to Decatur. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 22, 2026.
Explore the most affordable flight options available from Rapid City to Decatur. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 22, 2026.
This United Airlines deal was found by Cheapflights users on 9/22. 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 10/71:37 pm -
1 stop27h 16m
Sun 10/117:18 pm -
2 stops15h 10m
Deal found 9/22![United Airlines logo]()
$726
Best flights from Rapid City to DecaturDiscover carefully curated flight deals from Rapid City to Decatur that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 22, 2026.
Discover carefully curated flight deals from Rapid City to Decatur that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 22, 2026.
This United Airlines deal was found by Cheapflights users on 9/22. 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 10/71:37 pm -
1 stop27h 16m
Sun 10/117:18 pm -
2 stops15h 10m
Deal found 9/22![United Airlines logo]()
$726
Last-minute flights from Rapid City to DecaturDiscover last-minute flight deals from Rapid City to Decatur. Data last updated September 22, 2026 and is based on user searches.
Discover last-minute flight deals from Rapid City to Decatur. Data last updated September 22, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/22. 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 10/71:37 pm -
1 stop27h 16m
Sun 10/117:18 pm -
2 stops15h 10m
Deal found 9/22![United Airlines logo]()
$726
Find flight deals from Rapid City to Decatur
Discover tips and strategies to find the most affordable flight options for your journey from Rapid City (RAP) to Decatur (DEC). 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 September 22, 2026.
Round-trip from | $726 (United Airlines) |
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Cheapflights Fare Finder
Customize your flight search to find flights from Rapid City to Decatur 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 September 22, 2026.
Use the filters below to find and compare flights from Rapid City to Decatur that are best for you.
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Route
Depart
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Rapid CityDecatur
RAP Rapid City - DEC Decatur Arpt
RAPDEC
Rapid City
Wed 10/7
1:37 pm-5:53 pm
1 stop27h 16m
Decatur Arpt
Sun 10/11
7:18 pm-9:28 am
2 stops15h 10m
$726
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Best time to book a flight from Rapid City to Decatur
Have a flexible travel schedule? Discover the best time to fly to Decatur from Rapid City with our price prediction graph.
RAP-DEC
Estimated round-trip price
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Related info for your journey
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