Cheap flights from St. Louis to Rock Springs (STL - RKS)
STL — RKS
Feb 27 — Mar 61
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
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Find flight deals from St. Louis to Rock Springs
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Rock Springs (RKS). 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 January 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
- Most accurate provider: When it comes to deals on St. Louis-Rock Springs flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Rock Springs flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Rock Springs flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Rock Springs 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 St. Louis-Rock Springs 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 St. Louis to Rock Springs
Have a flexible travel schedule? Discover the best time to fly to Rock Springs from St. Louis with our price prediction graph.
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.
Reviews of airlines servicing Rock Springs
Get insights into the airlines that provide service to Rock Springs. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Rock Springs. Reviews last updated January 28, 2026.
Get a feel of what it's like to fly with United Airlines from St. Louis to Rock Springs by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
6.6
Boarding
7.7
Crew
8.1
Entertainment
7.1
Comfort
7.3
Overall
7.4
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Food
6.6
Boarding
7.7
Crew
8.1
Entertainment
7.1
Comfort
7.3
Overall
7.4
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
TYS - IAD
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Rock Springs. 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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Alternative routes for St. Louis to Rock Springs
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Top airline flying from St. Louis to Rock Springs
Discover the top airline that operate flights from St. Louis to Rock Springs. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$294 | Average$423 | FlexibilityNo cancel fee | On-time69% |