RAP - STL

$241 Find Cheap Flights from Rapid City to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Rapid City to St. Louis departing on 7/18. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Rapid City to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Rapid City to St. Louis, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$309
Typical prices: $283-$418
Delta
Wed 2/11Sat 2/14
RAP - STL • 1 stop
Cheapest one-way
$241
United Airlines
Sat 7/18
RAP - STL • 1 stop
Top airlines
Delta
Cheapest • from $309 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
June
Cheapest • 21% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to St. Louis!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Rapid City to St. Louis (RAP-STL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Rapid City to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Rapid City to St. Louis

Wed, Feb 11 - Sat, Feb 14
Delta Logo
4:10 pm - 11:25 pm
RAP
-
STL
6h 15m
1 stop
Delta Logo
6:10 am - 10:05 am
STL
-
RAP
4h 55m
1 stop
$309Delta
Wed, Feb 11 - Sat, Feb 14
Delta Logo
4:10 pm - 11:25 pm
RAP
-
STL
6h 15m
1 stop
Delta Logo
6:35 am - 3:44 pm
STL
-
RAP
10h 09m
2 stops
$314Delta
Wed, Feb 11 - Sat, Feb 14
Delta Logo
10:54 am - 8:43 pm
RAP
-
STL
8h 49m
2 stops
Delta Logo
6:35 am - 3:44 pm
STL
-
RAP
10h 09m
2 stops
$369Delta
Sun, Feb 15 - Thu, Feb 19
Delta Logo
4:29 pm - 11:23 pm
RAP
-
STL
5h 54m
1 stop
Delta Logo
5:29 pm - 10:27 pm
STL
-
RAP
5h 58m
1 stop
$481Delta
Sun, Feb 15 - Thu, Feb 19
United Airlines Logo
12:25 pm - 10:59 pm
RAP
-
STL
9h 34m
2 stops
United Airlines Logo
8:41 am - 3:17 pm
STL
-
RAP
7h 36m
1 stop
$527United Airlines
Sun, Feb 15 - Thu, Feb 19
United Airlines Logo
5:20 am - 2:29 pm
RAP
-
STL
8h 09m
2 stops
United Airlines Logo
6:25 am - 3:17 pm
STL
-
RAP
9h 52m
2 stops
$541United Airlines
Wed, May 6 - Sat, May 16
Delta Logo
6:00 am - 11:32 am
RAP
-
STL
4h 32m
1 stop
Delta Logo
6:45 am - 3:10 pm
STL
-
RAP
9h 25m
2 stops
$542Delta
Wed, May 6 - Sat, May 16
United Airlines Logo
10:00 am - 9:08 pm
RAP
-
STL
10h 08m
2 stops
United Airlines Logo
7:45 am - 7:15 pm
STL
-
RAP
12h 30m
2 stops
$659United Airlines
Booking Insights

KAYAK's insights & trends for Rapid City to St. Louis flights

Get data-powered insights and trends into flights from Rapid City to St. Louis to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Rapid City to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Rapid City to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Rapid City to St. Louis is June, where tickets cost $344 (return) on average. On the other hand, the most expensive months are March and April, where the average cost of round-trip tickets is $704 and $688 respectively.

Good to know

Low seasonMarch
Cheapest flight$241
Best time to beat the crowds but there is an average 60% increase in price.
Most popular time to fly and prices are also 3% lower on average.
Flight from Rapid City to St. Louis

When to book flights from Rapid City to St. Louis

Are your dates flexible? Find out the best times to travel from Rapid City to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Rapid City to St. Louis

  • What is the cheapest flight from Rapid City to St. Louis?

    In the last 3 days, the lowest price for a flight from Rapid City to St. Louis was $241 for a one-way ticket and $309 for a round-trip.

  • Do I need a passport to fly between Rapid City and St. Louis?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which aircraft models fly most regularly from Rapid City to St. Louis?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Rapid City to St. Louis?

    SkyTeam, and Star Alliance are the airline alliances operating flights between Rapid City and St. Louis, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Rapid City to St. Louis, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Rapid City to St. Louis are Delta and United Airlines. With an average price for the route of $284 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $418 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Rapid City to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Rapid City to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Rapid City to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Rapid City is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Rapid City to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Rapid City with another airline. Booking your flights between Rapid City and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Rapid City to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Rapid City up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from Rapid City to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Rapid City to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Rapid City to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8128 reviews
8.5Crew
8.1Boarding
7.2Food
7.8Entertainment
7.9Comfort
Airline reviews

I didn't take this flight. I changed the flight. Why am I getting surveys and notifications on flights that I change. Seems like a defect with Kayak.

2.0 MediocreTodd, Jan 2026
IAH - ATL
Read more Delta reviews

I didn't take this flight. I changed the flight. Why am I getting surveys and notifications on flights that I change. Seems like a defect with Kayak.

Delta One is extraordinary. I fly business when somebody hires me. I just wonder why there is such a chasm between business class and the insanely inhumane and nonsensical coach. The seats are not large enough to fit even my tiny wife. We fly 10% of what we did because we don’t want to pay 5-10 k but for $400 it’s unbearable. It seems like the accountants took over and made stupid decisions. Screw in 20 extra seats and make it so unbearable that people fly 90% less. Just put the damn price up and put some proper chairs in. But business, yay.

Timing, quality of service, promptness and courtesy of the staff

It was last minute due to weather - considering - it was amazing! Good smiles, friendly staff and they were making sure we knew what was going on when and where.

delta last minute gave me a boarding pass for a different flight with no confirmation that they were changing it

The service from the flight attendants were of supreme quality. They greeted and treated everyone with a wide smile. This is totally absent nowadays. Kudos to them!!!!

Excellent flight and got us around tough weather. Only issue was seat TV did not work and crew tried to reboot.

Very large passenger too space from my own seat. Arm board couldn’t be lowered because of his size. It wads very uncomfortable trip, as the flight was full couldn’t move anywhere having back pain because of the position in which I was the entire flight.

was sitting in the jet bridge for 10 minutes in -20 degree weather waiting for my bag

Outdated equipment in disrepair, wifi inoperable. Broken seats, taped air vents, generally poor condition, the 717 showed its age and lack of upkeep.

I was fully checked in the prior night and i was unchecked and then didn’t have a seat when I boarded. Instead of an aisle seat, I was out in the middle seat of the very last row of the plane.

In overall it was a good experience, the only down point was that the entertainment screen was working properly.

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

First class ticket gets you a choice of chips or nuts. . Just like economy Southwest. Also no screen in the seats. This is first class???!

Seated dude next to me even though lots of empty rows. But main thing was we sat on the tarmac after landing for 30 minutes because of, in the words of the dude who sat next to me, “operational incompetence”. We got changing directions about where to pick up gate checked bags. Pilot and flight attendant were awesome though.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

Flight arrived 30 min early and bag was waiting at the baggage pickup. United Club HNL was one of the nicest in the system

Unfortunately weather delayed our flight waiting for our plane to arrive and due to a little snow time was needed to deice the plane so departure was very delayed and I missed the connecting flight

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

I wish there were outlets to charge my iPhone. The crew was great; we had a female pilot who was great with explaining what was happening and delays,

Everything you need to know for your flight from Rapid City to St. Louis

Information on your arrival and departure airports