Cheap flights from Helena to St. Louis from $274
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Helena to St. Louis departing on 4/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Alaska Airlines flights from Helena to St. Louis
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How to get the cheapest flight ticket from Helena to St. Louis
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest day to depart on your flight to St. Louis?
The cheapest day to depart on your flight to St. Louis is on a Friday when prices can be found for as low as $388. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $896. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.
What is the cheapest time of day to depart on your flight to St. Louis?
Flying to St. Louis from Helena in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $388 when looking at flights departing in the afternoon. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $644 per ticket.
What is the cheapest airline that flies from Helena to Lambert-St Louis?
Delta is the most popular carrier operating from Helena to Lambert-St Louis
What airlines fly to St. Louis?
United Airlines, Delta and Southwest are the top three most popular airlines that fly to St. Louis from Helena according to our data. United Airlines is the first choice among our users, with 46% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 4 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.
When to book flights from Helena to St. Louis
Cheap Helena to St. Louis (HLN to STL) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Helena to St. Louis
How far is Helena to Lambert-St Louis by plane?
Helena and Lambert-St Louis are 1232.9 mi apart from one another. By plane, this route typically takes 6h 51m.
When did momondo last update prices for flights from Helena Airport to Lambert-St Louis Airport?
Prices for flights from Helena Airport to Lambert-St Louis Airport refresh daily.
How many operators does momondo search for flights from Helena Airport to Lambert-St Louis Airport?
The number of operators available for flights from Helena Airport to Lambert-St Louis Airport is 2 as of April 2025.
How old do you have to be to fly from Helena Airport to Lambert-St Louis Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Helena Airport to Lambert-St Louis Airport.
What documentation or ID do you need to fly to Lambert-St Louis Airport?
The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular airline from Helena to St. Louis?
Based on momondo bookings for flights between Helena and St. Louis, the leading airline is United Airlines, making up 52% of the total bookings. Other popular airlines include Delta with 48%.
Best airlines flying from Helena to St. Louis
Compare and see reviews for airlines that fly from Helena to St. Louis with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $309 | Free Cancellation | Rating 8.0 7,897 reviews | |||
| PriceFrom $434 | Free Cancellation | Rating 7.4 8,618 reviews |
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Why should I use momondo to find a flight deal from Helena to St. Louis?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Helena to St. Louis. momondo saves you time and could save you money on your trip.
Can I find flights from Helena to St. Louis with flexible booking policies on momondo?
Flights from Helena to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Helena to St. Louis?
momondo provides multiple filters to help you find the best flight to St. Louis from Helena. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from Helena to St. Louis right now. Can momondo alert me if prices change?
Price alerts on flights to St. Louis from Helena are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.