RDU - STL

$70 Find Cheap Flights from Raleigh 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 Raleigh to St. Louis departing on 4/7. 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 Raleigh 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 Raleigh to St. Louis, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$151
Overall average: $384
Frontier
Thu 4/30Tue 5/5
RDU - STL • 1 stop
Cheapest non-stop
$297
Typical prices: $373-$509
Southwest
Tue 4/14Tue 4/21
RDU - STL • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
RDU offers free Wi-Fi for 48 hours per session.
Use MetroLink from STL to avoid traffic downtown.
Expert advice
Expert advice
Expert advice
Expert advice
Nonstop flights
You can fly direct with Southwest. Average duration is 2h 12m
Direct flights
Direct flights
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Direct flights
Direct flights
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Top layover airports
Cheapest • Avg $233 (round-trip)
Shortest trip • 4h 04m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 28% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 10% price drop
Most popular
Good to know
Good to know
+1
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Good to know
Good to know
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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
Expert advice
Flight Deals

Cheap Flights from Raleigh to St. Louis (RDU-STL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Raleigh 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 Raleigh to St. Louis

Thu, Apr 30 - Tue, May 5
Frontier Logo
6:10 am - 6:50 am
RDU
-
STL
25h 40m
1 stop
Frontier Logo
6:41 pm - 8:04 am
STL
-
RDU
12h 23m
1 stop
$151Frontier
Thu, Apr 16 - Thu, Apr 23
Frontier Logo
6:10 am - 10:30 am
RDU
-
STL
5h 20m
1 stop
Frontier Logo
11:25 am - 11:43 pm
STL
-
RDU
11h 18m
1 stop
$155Frontier
Fri, Apr 17 - Mon, Apr 27
Frontier Logo
3:49 pm - 6:50 am
RDU
-
STL
16h 01m
1 stop
Frontier Logo
8:23 pm - 3:04 pm
STL
-
RDU
17h 41m
1 stop
$160Frontier
Tue, Apr 14 - Fri, Apr 17
Frontier Logo
4:00 pm - 6:50 am
RDU
-
STL
15h 50m
1 stop
Frontier Logo
8:23 pm - 9:06 am
STL
-
RDU
11h 43m
1 stop
$164Frontier
Fri, May 1 - Tue, May 5
Frontier Logo
3:49 pm - 6:50 am
RDU
-
STL
16h 01m
1 stop
Frontier Logo
6:41 pm - 12:33 am
STL
-
RDU
4h 52m
1 stop
$166Frontier
Sun, Apr 19 - Mon, Apr 27
Frontier Logo
6:10 am - 6:50 am
RDU
-
STL
25h 40m
1 stop
Frontier Logo
8:23 pm - 3:04 pm
STL
-
RDU
17h 41m
1 stop
$169Frontier
Fri, May 1 - Wed, May 6
Frontier Logo
3:49 pm - 6:50 am
RDU
-
STL
16h 01m
1 stop
Frontier Logo
5:27 pm - 12:33 am
STL
-
RDU
6h 06m
1 stop
$175Frontier
Mon, Apr 6 - Thu, Apr 9
Frontier Logo
3:57 pm - 10:30 am
RDU
-
STL
19h 33m
1 stop
Frontier Logo
6:29 pm - 8:46 am
STL
-
RDU
13h 17m
1 stop
$178Frontier
Mon, Apr 13 - Sat, Apr 18
Frontier Logo
12:37 pm - 11:25 pm
RDU
-
STL
11h 48m
1 stop
Frontier Logo
8:23 pm - 8:23 am
STL
-
RDU
11h 00m
1 stop
$180Frontier
Mon, Apr 13 - Mon, Apr 27
Frontier Logo
4:46 pm - 11:25 pm
RDU
-
STL
7h 39m
1 stop
Frontier Logo
8:17 pm - 6:44 pm
STL
-
RDU
21h 27m
1 stop
$189Frontier
Booking Insights

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

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

What’s the cheapest day of the week to fly from Raleigh to St. Louis?

The average price of all round-trip flights from Raleigh to St. Louis clicked on KAYAK for each day over the last 12 months.

When flying from Raleigh to St. Louis, you should consider leaving on a Wednesday and avoid Sundays if you are looking for the best rates. For your return to Raleigh, you’ll find the best rates on Mondays and the most expensive ones on Thursdays.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Raleigh 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 Raleigh to St. Louis is October, where tickets cost $350 (return) on average. On the other hand, the most expensive months are September and November, where the average cost of round-trip tickets is $417 and $417 respectively.

Can I save money by flying with a layover from Raleigh to St. Louis?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $382 on average.

How far in advance should I book a flight from Raleigh to St. Louis?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Raleigh to St. Louis, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Raleigh to St. Louis, you should book around 5 weeks before departure, which saves you about 28% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 26 weeks before departure.

Expert advice

Expert advice for your flight from Raleigh to St. Louis

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Jessica Macdonald

Jessica Macdonald

Expert on RDU

Currently based in Scotland after living in South Africa and the United States, Jessica has been writing travel and aviation content for more than 10 years. She regularly contributes to Travel + Leisure and TripSavvy, and has had work published by Condé Nast Traveller and The Independent. She has traveled to more than 50 countries across six continents.

Yulia Denisyuk

Yulia Denisyuk

Expert on STL

Yulia is a freelance journalist who’s dispatched from 90+ countries. Her work focuses on cultures, adventure trips and air travel, appearing in NatGeo, NYT, CNTraveler, and more. For past assignments, she’s stayed with nomads in Mongolia and learned the art of Imigongo in Rwanda. She’s based in Chicago; in winter she often questions that decision.

Good to know

Low seasonJanuary
Cheapest flight$63
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly with an average 3% increase in price.
Flight from Raleigh to St. Louis

When to book flights from Raleigh to St. Louis

Are your dates flexible? Find out the best times to travel from Raleigh 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 Raleigh to St. Louis

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

    In the last 3 days, the lowest price for a flight from Raleigh to St. Louis was $63 for a one-way ticket and $151 for a round-trip.

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

    No

  • Which airports will I be using when flying from Raleigh to St. Louis?

    On your way to St. Louis, you’ll fly out from Raleigh-Durham. You’ll be landing at Lambert-St Louis.

  • Which airlines offer Wi-Fi service onboard planes from Raleigh to St. Louis?

    Delta, American Airlines, JetBlue, and Alaska Airlines offer inflight Wi-Fi service on the Raleigh to St. Louis flight route.

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

    The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the Raleigh to St. Louis flight route.

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

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

  • On which days can I fly direct from Raleigh to St. Louis?

    There are nonstop flights from Raleigh to St. Louis on a daily basis.

  • Which is the best airline for flights from Raleigh to St. Louis, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Raleigh to St. Louis are Southwest and Delta. With an average price for the route of $425 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $351 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Raleigh 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 Raleigh to St. Louis.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Raleigh 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 Raleigh 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 Raleigh with another airline. Booking your flights between Raleigh 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 Raleigh 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 Raleigh up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Raleigh to St. Louis

  • Looking for a cheap flight? 25% of our users found flights on this route for $208 or less one-way and $377 or less round-trip.

Prefer to fly direct from Raleigh to St. Louis?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Raleigh-Durham to Lambert-St Louis.
Find which airlines fly direct from Raleigh-Durham Airport to Lambert-St Louis Airport, which days they fly and book direct flights.

Direct departures

Raleigh-Durham to Lambert-St Louis

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Direct returns

Lambert-St Louis to Raleigh-Durham

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Reviews of the top 5 airlines serving from Raleigh to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Raleigh 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 Raleigh 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.
8.0
SouthwestOverall score based on 4320 reviews
7.5Entertainment
7.0Food
8.1Boarding
8.6Crew
8.0Comfort
Airline reviews

We had a 5 hour delay on the tarmac in Baltimore

2.0 MediocreDavid, Mar 2026
ALB - BWI
Read more Southwest reviews

We had a 5 hour delay on the tarmac in Baltimore

Long layover between flights to Long Island from BWI - need better coordination between flights

I elected to pay for the upgrades and found very little difference

The new seating arrangement is so over priced for what you get.

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

No food or entertainment, just a quick 40 minute flight. A little bumpy due to Santa Ana winds but pilot has no control over that. Good flight and landing!

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

I realize they are still working out kinks with the new boarding process, but by the time I boarded in group 5, most of the bins were full. All airlines should better enforce small bags and jackets going under the seats until everyone has boarded.

WiFi was not working and didn’t have a beverage service

Snacks are always pretzels. Why can't you also offer peanuts ?

Perhaps when you’re sitting in 1st class and the crew closes the bathroom for the pilots, there could be a notification other than holding your hands up as a blockade when you get there and you’re told the restrooms are closed please turn around … especially at night when visibility is poor and you’re met by a flight attendants with their arms up

First class is comfortable. Enjoyed a movie and was able to relax compared to coach.

Loved flying First Class. Very comfortable. The seat was amazing. Enjoyed a movie and was able to relax so much better than in coach.

We landed and sat on the tarmac for 45 minutes because they only have one gate at the airport and there was another plane running late so we had to wait

The WiFi was not working. That made for a long flight.

Absolutely no communication on why there's a delay and multiple flight time reschedules. I would have canceled the flight and drove back home if I known it was going to be rescheduled 3 or 4 times.

Another late night flight and MORE men belligerently drinking and yelling. I had to move from first to economy because they were so obnoxious and disruptive. Crazy to go from a cozy chair to cardboard when you were supposed to be in first. Delta allows was too much drinking which leads to belligerent behavior.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

Stop changing gates. Stop cancelling flights Stop moving my seat.

OK, we were delayed and had to de plane and reboard.

United is one airline which regardless of how many separate United tickets in existence, if one flight breaks down, the airline will take care of all the flights.

Both our flights were delayed. Almost didn’t get in the second flight. Staff was rude to the bone.

Both my flight where delayed Had 25min to make it to my transfer flight

Everything was on time and service on the flight was great!

Wifi Bluetooth features for watching in flight movie was horrible. Screen kept blacking out no connection of sound although it said connected. Other than that smooth trip .

The travel company that you have on your site did me so wrong. I don’t know how it happened, but they put my son‘s name on my plane ticket flying to Vietnam. Along with his birthday. They would not have let me fly from Fort Myers to Ho Chi Minh City. I don’t think that I can ever use your service again. I typed my information into the browser along with my passport number and four days before I’m leaving I have to quickly search another ticket to fly out here.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

It’s always a great time flying with united airlines.

American Airlines did everything they could with the high Spring Break crowd. I was frustrated to be changed from 1st class to a middle seat at the back of the plane. This has happened before, not sure booking 1st class and paying the extra actually works.

Plane from partner PSA was filthy. Plastic needs to be thoroughly cleaned. Really disgusting to look at and wonder about cleanliness of parts less visible.

Small plane, poor meal choices for first class, bad terminal and boarding experience at LAX

Arrived early picked up my bag in a few minutes- great trip - thank you

I like that the flight attendant was very attentive and helpful. The meal menu could have more of an variety of food choices.

We missed our flight and got stranded in Miami where we had to rent a hotel we could not afford. they would not work with us because they said it was weather related even though the gate attendant said it was not. I could go on but trying to get satisfaction has wore me down, which I believe is the intent. My only solution is to never fly AA again.

Overall it was a good flight. Because we traveled on a Saturday we were upgraded to FC since my wife and I are both Executive Platinum. The only areas for improvement we noted are better snack assortment and perhaps a little nicer plane as American is flying some older planes now. Everything else on this flight was excellent, which is frankly not the norm for American since we have had multiple issues on prior AA flights.

Boarding delayed 20 minutes for no reason, no wifi, in flight entertainment, or snacks / waters?

Didn't get a seat assignment until the last minute even though i picked a seat.

Flight was smooth, quick and felt safe. The 2 delays not happening would have been better but I guess that happens in the airline industry

More inflight connection. And leg space is horrible. And the paying for baggage I'd ridiculous!!!

My flight was originally from SAT to MCO connecting from MCO to ORD. We got diverted to ATL and than Frontier staff there was sooo un helpful first they said they couldn’t give us any accommodation since our flight first got delayed that cancelled and now it’s 221am and I am still in ATL since they said they need to create a new flight my final destination is ORD and I have been delayed twice and cancelled. With no real help the frontier app didn’t work no email updates over all such a horrible experience

There's no seats that lean back with little leg space i wad uncomfortable the entire flight. Your charges for extra baggage is despicable and costly!!

Remind customers of the need to have passport or new ID for boarding.

Flight was canceled. Most upsetting was message from Kayak, stating that the flight was canceled and click with Kayak for details regarding rebook, refund details. THERE'S NO INFORMATION PROVIDED BY KAYAK EXCEPT THAT FLIGHT IS CANCELED. AND NOW THIS SURVEY TO FIND OUT HOW WAS THE FLIGHT !!!!!!!

The flight never took off and we spent 7 hours at the airport

Gate not determined until I got to the airport - hard to plan the trip to the airport.

Our flight was canceled. I will never use Kayak nor Frontier for travel again. The entire experience was a headache.

Frontier.. nickel and dime add-ons. Flight late, on time, late again, last minute gate change, arrival gate required a shuttle to the terminal. They sure keep you guessing.. if you like a little chaos and airport anxiety, this is the airline for you!

This is my second time flying with Frontier. My current experience was very favorable. The staff from the gate to the plane was friendly, warm and professional. The food options lacked in my opinion. This area needs some attention in my opinion.

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

Information on your arrival and departure airports