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Cheap flight deals from Helena to St. Louis Starting at $297

For as little as $297, you can take your next adventure to St. Louis without breaking the bank. Choose between one-way and return tickets from Helena below.

  • Round-trip
      • HLN01:30 pm
        8h 44m
        2 stops
        STL11:14 pm
        Wed, Jan 29|Helena - St. Louis|Delta Air Lines
        STL11:50 am
        12h 4m
        2 stops
        HLN10:54 pm
        Tue, Feb 4|St. Louis - Helena|Delta Air Lines
        $297$464
        36% OFF
        36% OFF
        $464$297

        Choose Delta Air Lines flights from Helena to St. Louis. The one-way connecting flight with Delta Air Lines departs from Helena Regional Airport on Wed, Jan 29-Tue, Feb 4, arriving at St. Louis Lambert International Airport. One-way Prices start from $297 including taxes and charges.

      • HLN05:50 am
        6h 53m
        1 stop
        STL01:43 pm
        Tue, Jan 21|Helena - St. Louis|Delta Air Lines
        STL07:40 am
        6h 10m
        1 stop
        HLN12:50 pm
        Mon, Jan 27|St. Louis - Helena|Delta Air Lines
        $303$464
        35% OFF
        35% OFF
        $464$303

        Choose Delta Air Lines flights from Helena to St. Louis. The one-way connecting flight with Delta Air Lines departs from Helena Regional Airport on Tue, Jan 21-Mon, Jan 27, arriving at St. Louis Lambert International Airport. One-way Prices start from $303 including taxes and charges.

      • HLN01:30 pm
        9h 8m
        2 stops
        STL11:38 pm
        Thu, Jan 23|Helena - St. Louis|Delta Air Lines
        STL05:00 pm
        7h 7m
        1 stop
        HLN11:07 pm
        Wed, Jan 29|St. Louis - Helena|Delta Air Lines
        $308$464
        34% OFF
        34% OFF
        $464$308

        Choose Delta Air Lines flights from Helena to St. Louis. The one-way connecting flight with Delta Air Lines departs from Helena Regional Airport on Thu, Jan 23-Wed, Jan 29, arriving at St. Louis Lambert International Airport. One-way Prices start from $308 including taxes and charges.

      • HLN01:30 pm
        9h 7m
        2 stops
        STL11:37 pm
        Tue, Jan 28|Helena - St. Louis|Delta Air Lines
        STL02:00 pm
        9h 54m
        2 stops
        HLN10:54 pm
        Mon, Feb 3|St. Louis - Helena|Delta Air Lines
        $308
        $308

        Choose Delta Air Lines flights from Helena to St. Louis. The one-way connecting flight with Delta Air Lines departs from Helena Regional Airport on Tue, Jan 28-Mon, Feb 3, arriving at St. Louis Lambert International Airport. One-way Prices start from $308 including taxes and charges.

      • HLN01:30 pm
        8h 44m
        2 stops
        STL11:14 pm
        Sat, Jan 25|Helena - St. Louis|Delta Air Lines
        STL05:00 pm
        7h 7m
        1 stop
        HLN11:07 pm
        Fri, Jan 31|St. Louis - Helena|Delta Air Lines
        $320
        $320

        Choose Delta Air Lines flights from Helena to St. Louis. The one-way connecting flight with Delta Air Lines departs from Helena Regional Airport on Sat, Jan 25-Fri, Jan 31, arriving at St. Louis Lambert International Airport. One-way Prices start from $320 including taxes and charges.

      • HLN04:41 pm
        20h 12m
        1 stop
        STL01:53 pm
        Mon, Jan 27|Helena - St. Louis|Alaska Airlines
        STL07:00 am
        10h 4m
        1 stop
        HLN04:04 pm
        Sun, Feb 2|St. Louis - Helena|Alaska Airlines
        $356
        $356

        Choose Alaska Airlines flights from Helena to St. Louis. The one-way connecting flight with Alaska Airlines departs from Helena Regional Airport on Mon, Jan 27-Sun, Feb 2, arriving at St. Louis Lambert International Airport. One-way Prices start from $356 including taxes and charges.

      • HLN04:41 pm
        20h 12m
        1 stop
        STL01:53 pm
        Tue, Jan 21|Helena - St. Louis|Alaska Airlines
        STL02:49 pm
        26h 15m
        1 stop
        HLN04:04 pm
        Mon, Jan 27|St. Louis - Helena|Alaska Airlines
        $364
        $364

        Choose Alaska Airlines flights from Helena to St. Louis. The one-way connecting flight with Alaska Airlines departs from Helena Regional Airport on Tue, Jan 21-Mon, Jan 27, arriving at St. Louis Lambert International Airport. One-way Prices start from $364 including taxes and charges.

      • HLN04:41 pm
        20h 12m
        1 stop
        STL01:53 pm
        Tue, Jan 28|Helena - St. Louis|Alaska Airlines
        STL02:49 pm
        26h 15m
        1 stop
        HLN04:04 pm
        Mon, Feb 3|St. Louis - Helena|Alaska Airlines
        $369
        $369

        Choose Alaska Airlines flights from Helena to St. Louis. The one-way connecting flight with Alaska Airlines departs from Helena Regional Airport on Tue, Jan 28-Mon, Feb 3, arriving at St. Louis Lambert International Airport. One-way Prices start from $369 including taxes and charges.

      • HLN04:41 pm
        20h 12m
        1 stop
        STL01:53 pm
        Wed, Jan 22|Helena - St. Louis|Alaska Airlines
        STL02:49 pm
        26h 15m
        1 stop
        HLN04:04 pm
        Tue, Jan 28|St. Louis - Helena|Alaska Airlines
        $378
        $378

        Choose Alaska Airlines flights from Helena to St. Louis. The one-way connecting flight with Alaska Airlines departs from Helena Regional Airport on Wed, Jan 22-Tue, Jan 28, arriving at St. Louis Lambert International Airport. One-way Prices start from $378 including taxes and charges.

      • HLN02:25 pm
        5h 18m
        1 stop
        STL08:43 pm
        Wed, Jan 29|Helena - St. Louis|United Airlines
        STL08:27 am
        6h 14m
        1 stop
        HLN01:41 pm
        Tue, Feb 4|St. Louis - Helena|United Airlines
        $381
        $381

        Choose United Airlines flights from Helena to St. Louis. The one-way connecting flight with United Airlines departs from Helena Regional Airport on Wed, Jan 29-Tue, Feb 4, arriving at St. Louis Lambert International Airport. One-way Prices start from $381 including taxes and charges.

      • HLN01:00 pm
        3h 5m
        Nonstop
        STL02:00 pm
        Sat, Jan 25|Helena - St. Louis|Delta Air Lines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

When is the cheapest time to fly from Helena to St. Louis?

Explore the best time to buy affordable tickets to St. Louis with our price trend chart, which predicts how flight prices will change in the coming weeks from previous data.

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

Find cheap airlines flights from Helena to St. Louis

We have a range of prices from different airlines providing flights from Helena to St. Louis. Check below for the journey which best suits your travel needs.
Alaska Airlines logoAlaska Airlines

Alternative Cheap Routes from Helena to St. Louis

Searching for potential routes that might be cheaper and faster? There are a few alternative ways to get to St. Louis from Helena which could help you save money and time.

  • Cheapest
    Delta Air Lines
    HLN
    01:30 pm
    8h 44m
    4 transfer
    STL
    11:14 pm
    Helena Regional Airport - St.Louis Lambert International Airport
    Wed, Jan 29Delta Air Lines
    $297
  • Delta Air Lines
    HLN
    01:30 pm
    8h 44m
    4 transfer
    STL
    11:14 pm
    Helena Regional Airport - St.Louis Lambert International Airport
    Wed, Jan 29Delta Air Lines
    $297
    Find More Flights

Frequently Asked Questions

  • When are flight tickets from Helena (HLN) to St. Louis (STL) the cheapest?

    Airlines adjust prices for flights from Helena to St. Louis based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from Helena (HLN) to St. Louis (STL) cost?

    According to Trip.com's data, the lowest price is around $620.

  • What is the transportation method from the main airport to downtown in St. Louis?

    • The distance from St. Louis Lambert International Airport to downtown is about 20 km. It takes about 40 minutes by taxi.

How to find a cheap flight from Helena to St. Louis

If you don’t know some of the key things to look out for when buying flight tickets, prices can often end up sky high or, worse, sold out! We’ve carefully compiled our six most important steps to help ensure you’re getting the best deals when planning your next journey.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Flight Info | Helena to St. Louis

Off-season for travelJanuary
Peak season for travelDecember
Flight distance1,983.91 km
Popular airlineAlaska Airlines

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