HLN - STL

$260 Find Cheap Flights from Helena 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 Helena to St. Louis departing on 6/20. 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 Helena 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 Helena 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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Everything you should know

Cheapest round-trip
$429
United Airlines
Sat 5/2Tue 5/5
HLN - STL • 1 stop
Cheapest one-way
$260
Delta
Sat 6/20
HLN - STL • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Helena and St. Louis. You'll need at least 1 connection.
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Top layover airports
Denver (DEN)
Cheapest • Avg $553 (round-trip)
Denver (DEN)
Shortest trip • 5h 15m (one-way)
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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 Helena to St. Louis (HLN-STL)

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

Sat, May 2 - Tue, May 5
United Airlines Logo
6:15 am - 2:28 pm
HLN
-
STL
7h 13m
1 stop
United Airlines Logo
4:06 pm - 9:46 pm
STL
-
HLN
6h 40m
1 stop
$429United Airlines
Sat, May 2 - Tue, May 5
United Airlines Logo
6:15 am - 2:28 pm
HLN
-
STL
7h 13m
1 stop
United Airlines Logo
9:21 am - 9:46 pm
STL
-
HLN
13h 25m
2 stops
$434United Airlines
Sat, May 2 - Tue, May 5
United Airlines Logo
6:15 am - 2:28 pm
HLN
-
STL
7h 13m
1 stop
United Airlines Logo
4:06 pm - 9:46 pm
STL
-
HLN
6h 40m
1 stop
$439United Airlines
Sat, May 2 - Tue, May 5
United Airlines Logo
2:30 pm - 8:43 pm
HLN
-
STL
5h 13m
1 stop
United Airlines Logo
9:21 am - 9:46 pm
STL
-
HLN
13h 25m
2 stops
$444United Airlines
Sun, Apr 12 - Thu, Apr 16
Delta Logo
5:30 am - 1:17 pm
HLN
-
STL
6h 47m
1 stop
Delta Logo
7:00 am - 12:24 pm
STL
-
HLN
6h 24m
1 stop
$469Delta
Sat, May 2 - Tue, May 5
Alaska Airlines Logo
6:22 pm - 8:54 am
HLN
-
STL
13h 32m
2 stops
Alaska Airlines Logo
5:20 am - 5:45 pm
STL
-
HLN
13h 25m
2 stops
$515Alaska Airlines
Sat, May 2 - Tue, May 5
Alaska Airlines Logo
6:22 pm - 8:54 am
HLN
-
STL
13h 32m
2 stops
Alaska Airlines Logo
5:20 am - 5:45 pm
STL
-
HLN
13h 25m
2 stops
$519Alaska Airlines
Sat, May 2 - Tue, May 5
United Airlines Logo
6:15 am - 11:19 pm
HLN
-
STL
16h 04m
2 stops
United Airlines Logo
10:25 am - 9:46 pm
STL
-
HLN
12h 21m
2 stops
$534United Airlines
Sat, May 2 - Tue, May 5
United Airlines Logo
6:15 am - 10:45 pm
HLN
-
STL
15h 30m
2 stops
United Airlines Logo
9:21 am - 9:46 pm
STL
-
HLN
13h 25m
2 stops
$549United Airlines
Booking Insights

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

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

Which airlines provide the cheapest flights from Helena to St. Louis?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Helena to St. Louis were found on United Airlines ($429) and Delta ($469).

Find deals

Good to know

Cheapest flight$260
Flight from Helena to St. Louis

When to book flights from Helena to St. Louis

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

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

    In the last 3 days, the lowest price for a flight from Helena to St. Louis was $260 for a one-way ticket and $429 for a round-trip.

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

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

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

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

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

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

Information on your arrival and departure airports

Helena (HLN)
St. Louis (STL)