$206 Cheap flights from Helena Regional to Lambert-St. Louis Intl. (HLN to STL)

Discover our best flights from Helena HLN to St. Louis STL. 

With 19 airlines to choose from on Travelocity, you can easily find the best option for you. Use our filters to sort by price, compare airlines, and find the most convenient flight times. 

Find our best return flights from Helena HLN to St. Louis STL at the right price  

Airfares to St. Louis STL from Helena HLN currently cost between $382 and $411. It’s usually cheaper to book a round trip than two separate one-way flights. Prices and availability subject to change. Additional terms may apply. 

Book one-way flights from Helena HLN to St. Louis STL 

If you want to be flexible about when you return, or keep your travel options open ended, a one-way flight could be just the ticket! You’ll find one-way airfares from Helena HLN to St. Louis STL on Travelocity starting at $206. Prices and availability subject to change. Additional terms may apply. 

Get to St. Louis STL from Helena HLN quicker with direct flights. 

Get to St. Louis faster, without the hassle of changing planes and moving baggage, by booking a direct flight. Expect your direct flight to STL from HLN to take around hour(s) min(s).  

Find our cheapest airfares for flights from Helena HLN to St. Louis STL

Find cheap flight deals by using our search filters to sort results starting with the lowest price airfares to STL from HLN. Our Price Match Promise means if you find a lower rate on Travelocity.com or on another US-based website within 24 hours of booking, we’ll credit or refund the difference.  

Get our best airfare deals for your flight from Helena HLN to St. Louis STL today 

If you’re flexible about when you travel, October is usually the cheapest month to fly from Helena HLN to St. Louis STL. If you need to be more specific, search by date and arrival and departure times.Then, compare prices across different airlines, and sort results by lowest price first. 

Book flexible airline tickets for flights to St. Louis STL from Helena HLN 

Some airlines let you change your travel dates without charging a fee. Use our ‘no change fee’ filter to see which flights to STL from HLN have this option.  

Travel with confidence when you book flights to St. Louis STL from Helena HLN with Travelocity 

We’ve secured fantastic deals with all the main airline carriers and it’s easy to compare, choose, and book with Travelocity. With 24/7 customer service and our free 'App', we’ll always keep you moving.