Find cheap Alaska Airlines flights to St. Louis
RDU — STL
Aug 26 — Sep 21
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Leverage Cheapflights for Your Next Trip
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.Find Alaska Airlines flight deals to St. Louis
Cheapest
Best
Direct
Last-minute
One-way
Cheapest Alaska Airlines flights from USA to St. LouisExplore the most affordable Alaska Airlines flight options available from USA to St. Louis. Find the lowest fares with prices last updated on July 27, 2026.
Explore the most affordable Alaska Airlines flight options available from USA to St. Louis. Find the lowest fares with prices last updated on July 27, 2026.
This Alaska Airlines deal was found by Cheapflights users on 7/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/258:05 am
SEA
- STL
Nonstop4h 01m
Alaska Airlines
Sun 8/307:36 pm
STL
- SEA
Nonstop4h 23m
Alaska Airlines
Deal found 7/24![Alaska Airlines logo]()
$372
This Alaska Airlines deal was found by Cheapflights users on 7/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:08 am
SEA
- STL
1 stop8h 02m
Alaska Airlines
Wed 8/263:04 pm
STL
- SEA
Nonstop4h 23m
Alaska Airlines
Deal found 7/26![Alaska Airlines logo]()
$382
This Expedia deal was found by Cheapflights users on 7/24. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/228:05 am
SEA
- STL
Nonstop4h 01m
Alaska Airlines
Sat 8/296:35 am
STL
- SEA
Nonstop4h 27m
Alaska Airlines
Deal found 7/24![Alaska Airlines logo]()
$394
Best Alaska Airlines flights from USA to St. LouisDiscover carefully curated Alaska Airlines flight deals from USA to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 27, 2026.
Discover carefully curated Alaska Airlines flight deals from USA to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 27, 2026.
This Alaska Airlines deal was found by Cheapflights users on 7/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/28:05 am
SEA
- STL
Nonstop3h 59m
Alaska Airlines
Sun 9/66:35 am
STL
- SEA
Nonstop4h 27m
Alaska Airlines
Deal found 7/26![Alaska Airlines logo]()
$365
This Priceline deal was found by Cheapflights users on 7/22. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1612:35 pm
SEA
- STL
Nonstop4h 03m
Alaska Airlines
Mon 9/217:36 pm
STL
- SEA
Nonstop4h 23m
Alaska Airlines
Deal found 7/22![Alaska Airlines logo]()
$367
This Alaska Airlines deal was found by Cheapflights users on 7/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/238:13 am
SEA
- STL
Nonstop4h 08m
Alaska Airlines
Mon 9/287:36 pm
STL
- SEA
Nonstop4h 23m
Alaska Airlines
Deal found 7/27![Alaska Airlines logo]()
$372
Direct Alaska Airlines flights from USA to St. LouisExplore non-stop Alaska Airlines flight options from USA to St. Louis based on user searches, and compare prices and availability for your desired travel dates. Data last updated July 27, 2026.
Explore non-stop Alaska Airlines flight options from USA to St. Louis based on user searches, and compare prices and availability for your desired travel dates. Data last updated July 27, 2026.
This Expedia deal was found by Cheapflights users on 7/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/58:05 am
SEA
- STL
Nonstop3h 59m
Alaska Airlines
Wed 9/306:29 am
STL
- SEA
Nonstop4h 27m
Alaska Airlines
Deal found 7/27![Alaska Airlines logo]()
$337
This Alaska Airlines deal was found by Cheapflights users on 7/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/212:42 pm
SEA
- STL
Nonstop3h 56m
Alaska Airlines
Sun 9/66:35 am
STL
- SEA
Nonstop4h 27m
Alaska Airlines
Deal found 7/27![Alaska Airlines logo]()
$365
This Priceline deal was found by Cheapflights users on 7/22. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1612:35 pm
SEA
- STL
Nonstop4h 03m
Alaska Airlines
Mon 9/217:36 pm
STL
- SEA
Nonstop4h 23m
Alaska Airlines
Deal found 7/22![Alaska Airlines logo]()
$367
Last-minute Alaska Airlines flights from USA to St. LouisDiscover last-minute Alaska Airlines flight deals from USA to St. Louis. Data last updated July 27, 2026 and is based on user searches.
Discover last-minute Alaska Airlines flight deals from USA to St. Louis. Data last updated July 27, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 7/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/258:05 am
SEA
- STL
Nonstop4h 01m
Alaska Airlines
Sun 8/307:36 pm
STL
- SEA
Nonstop4h 23m
Alaska Airlines
Deal found 7/24![Alaska Airlines logo]()
$372
This Alaska Airlines deal was found by Cheapflights users on 7/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/197:08 am
SEA
- STL
1 stop8h 02m
Alaska Airlines
Wed 8/263:04 pm
STL
- SEA
Nonstop4h 23m
Alaska Airlines
Deal found 7/26![Alaska Airlines logo]()
$382
This Expedia deal was found by Cheapflights users on 7/24. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/228:05 am
SEA
- STL
Nonstop4h 01m
Alaska Airlines
Sat 8/296:35 am
STL
- SEA
Nonstop4h 27m
Alaska Airlines
Deal found 7/24![Alaska Airlines logo]()
$394
One-way Alaska Airlines flights to St. LouisSearch for one-way Alaska Airlines flight options to St. Louis. Find affordable one-way fares based on user searches. Data last updated July 27, 2026.
Search for one-way Alaska Airlines flight options to St. Louis. Find affordable one-way fares based on user searches. Data last updated July 27, 2026.
This Alaska Airlines deal was found by Cheapflights users on 7/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/258:05 am
SEA
- STL
Nonstop4h 01m
Alaska Airlines
Deal found 7/24![Alaska Airlines logo]()
$169
This Priceline deal was found by Cheapflights users on 7/24. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/66:03 pm
SEA
- STL
Nonstop3h 56m
Alaska Airlines
Deal found 7/24![Alaska Airlines logo]()
$197
This Alaska Airlines deal was found by Cheapflights users on 7/22. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 1/188:32 am
SEA
- STL
Nonstop3h 54m
Alaska Airlines
Deal found 7/22![Alaska Airlines logo]()
$199
Flights to St. Louis with Alaska Airlines at a glance
Find detailed information about Alaska Airlines flights from USA to St. Louis. Explore the options provided by Alaska Airlines to plan your journey from USA to St. Louis. Data last updated July 27, 2026.
Cheapflights Insights
Find cheap Alaska Airlines flights to St. Louis
US0-STL
SEA-STL
How long is the flight to St. Louis with Alaska Airlines?
On average, Alaska Airlines flights from the United States to St. Louis take 2 hours 3 minutes. Flights to St. Louis from other popular cities in the United States will vary in length. Below are a few examples of popular routes and their flight times.
Alaska Airlines weekly flight availability to St. Louis
The most flights to St. Louis operated by Alaska Airlines are scheduled on a Monday (20 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (18 on average).
When is the best time to book a flight to St. Louis with Alaska Airlines?
The best time to book a flight to St. Louis with Alaska Airlines is 76 days before departure. On average, fares are higher if you book 3 days before departure.
FAQs about flights to St. Louis with Alaska Airlines
Reviews of Alaska Airlines
See what Cheapflights users have to say about their Alaska Airlines experience.
Overview
Reviews
Alaska Airlines
10,000 reviews
Overview
Crew
8.5
Boarding
8.1
Comfort
7.8
Food
7.0
Entertainment
7.0
Recent reviews
10.0
|Jul 2026Excellent service as usual
6.0
|Jul 2026Alaska has a brilliant crew. And the seats are good. As much as i loved my trip from Heathrow to Seattle, i definitely did not feel the same on the return flight. A lot was due to feeling very cramped and unfortunately for me, i had a kicker behind me and a passenger who did not stop moving (but constantly) next to me. The good was not good and i noticed that most people around me left most of their meal. The ice cream was very nice. I did not have breakfast. However the food was very nice on the way to Seattle
10.0
|Jun 2026Comfortable seats and friendly crew.
10.0
|Jun 2026It's my first time flying with Alaska Airlines. All in all it was very good. Excellent crew and the meal was really good .. best mashed potato!! Black point: not waking me up for breakfast. Having departed late from London and arriving in Seattle late at night, it would have been nice to have found a meal on the table when i woke up. Although the crew was very lovely, kind and helpful, I did find it a little regimented in their approach. Also the constant interruptions announcing what we were eating next and unnecessary announcements.
4.0
|Jun 2026There was a delay and my husband needs a wheelchair and we were moved from 1 gate to another.
1 out of 3334
Popular Alaska Airlines flights
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Airports nearby
Alaska Airlines
Complete your trip
Domestic flights to St. Louis
Flights by cabin class
Flights from STL
Flights to STL
Popular destinations
Popular flights
Popular routes
Popular United States flight routes
United States flights