A dilapidated wooden cabin surrounded by dense forest.

Cheap flights to Lewis and Clark County

View €896 flight on Mon, 3 Aug 2026Opens in a new window

Popular airlines to Lewis and Clark County

  • Alaska Airlines

  • United

  • Delta

  • KLM

  • Air France

  • Virgin Atlantic

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Cheap round-trip flights to Lewis and Clark County

Prices were available within the past 7 days and start at €896 for one-way flights and €1,097 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Brussels Airlines
Fri, 17 Jul - Tue, 21 Jul
DUB
Dublin
HLN
Helena
€1,097 Return, found 6 days ago
€1,097
Return
found 6 days ago
Select Brussels Airlines flight, departing Fri, 17 Jul from Dublin to Helena, returning Tue, 21 Jul, priced at €1,097 found 6 days ago
United
Fri, 17 Jul - Tue, 21 Jul
DUB
Dublin
HLN
Helena
€1,097 Return, found 6 days ago
€1,097
Return
found 6 days ago
Select United flight, departing Fri, 17 Jul from Dublin to Helena, returning Tue, 21 Jul, priced at €1,097 found 6 days ago
United
Fri, 17 Jul - Tue, 21 Jul
DUB
Dublin
HLN
Helena
€1,131 Return, found 6 days ago
€1,131
Return
found 6 days ago
Select United flight, departing Fri, 17 Jul from Dublin to Helena, returning Tue, 21 Jul, priced at €1,131 found 6 days ago
United
Fri, 17 Jul - Tue, 21 Jul
DUB
Dublin
HLN
Helena
€1,164 Return, found 6 days ago
€1,164
Return
found 6 days ago
Select United flight, departing Fri, 17 Jul from Dublin to Helena, returning Tue, 21 Jul, priced at €1,164 found 6 days ago
United
Fri, 17 Jul - Tue, 21 Jul
DUB
Dublin
HLN
Helena
€1,168 Return, found 6 days ago
€1,168
Return
found 6 days ago
Select United flight, departing Fri, 17 Jul from Dublin to Helena, returning Tue, 21 Jul, priced at €1,168 found 6 days ago
Delta
Fri, 17 Jul - Tue, 21 Jul
DUB
Dublin
HLN
Helena
€1,196 Return, found 6 days ago
€1,196
Return
found 6 days ago
Select Delta flight, departing Fri, 17 Jul from Dublin to Helena, returning Tue, 21 Jul, priced at €1,196 found 6 days ago
United
Fri, 17 Jul - Tue, 21 Jul
DUB
Dublin
HLN
Helena
€1,202 Return, found 6 days ago
€1,202
Return
found 6 days ago
Select United flight, departing Fri, 17 Jul from Dublin to Helena, returning Tue, 21 Jul, priced at €1,202 found 6 days ago
KLM
Fri, 17 Jul - Tue, 21 Jul
DUB
Dublin
HLN
Helena
€1,212 Return, found 6 days ago
€1,212
Return
found 6 days ago
Select KLM flight, departing Fri, 17 Jul from Dublin to Helena, returning Tue, 21 Jul, priced at €1,212 found 6 days ago
Delta
Sat, 15 Aug - Sat, 22 Aug
DUB
Dublin
HLN
Helena
€1,215 Return, found 6 days ago
€1,215
Return
found 6 days ago
Select Delta flight, departing Sat, 15 Aug from Dublin to Helena, returning Sat, 22 Aug, priced at €1,215 found 6 days ago
Air France
Sat, 15 Aug - Sat, 22 Aug
DUB
Dublin
HLN
Helena
€1,541 Return, found 6 days ago
€1,541
Return
found 6 days ago
Select Air France flight, departing Sat, 15 Aug from Dublin to Helena, returning Sat, 22 Aug, priced at €1,541 found 6 days ago

Trending flights to Lewis and Clark County

These prices were available within the past 7 days. Prices quoted are per person, return, for the period specified. Prices and availability are subject to change. Additional terms apply.

Brussels Airlines
Fri, 17 Jul - Tue, 21 Jul
DUB
Dublin
HLN
Helena
€1,097 Return, found 6 days ago
€1,097
Return
found 6 days ago
Select Brussels Airlines flight, departing Fri, 17 Jul from Dublin to Helena, returning Tue, 21 Jul, priced at €1,097 found 6 days ago

Frequently asked questions

How do I find cheap flights to Lewis and Clark County that have flexible change policies?
By using our clever "No change fee" filter, that's how. Simply type in your dates and other details, click the "Search" button, then check the box directly under the "Flexible change policies" subheading (it's on the left). Expedia makes it simple to find cheap, flexible flights to Lewis and Clark County.
Which airlines fly to Lewis and Clark County?
With a good range of airlines operating flights into or near Lewis and Clark County, you're not short on choice:

  • Delta Air Lines - 60 flights to or near Lewis and Clark County each month, including 60 flights to Helena Regional Airport (HLN) per month.
  • United Airlines - 56 flights to or near Lewis and Clark County each month, including 56 flights to Helena Regional Airport (HLN) per month.
  • Alaska Airlines - 30 flights to or near Lewis and Clark County each month, including 30 flights to Helena Regional Airport (HLN) per month.

How can I find cheap tickets to Lewis and Clark County?
A helpful strategy for getting your hands on cheap tickets is to be flexible with your dates. Start by searching for your flight to Lewis and Clark County, then click on the "flexible dates" box for a list of prices for nearby days. Want another good tip? Book well ahead of time. For an idea of costs, €1,097 was the lowest price for a flight to Lewis and Clark County in the last seven days.
How much is a flight to Lewis and Clark County?
You could have picked up a return air ticket to Lewis and Clark County from anywhere between €1,097 and €1,541 in the last seven days. For one-way journeys leaving from Dublin (DUB), the lowest price during this time was €896.
What are the most popular airports to fly into in Lewis and Clark County?
Start planning your Lewis and Clark County escape by securing one of the 147 flights a month to Helena Regional Airport (HLN). This is the region's main gateway.
How much is a plane ticket to Lewis and Clark County?
In the last seven days, plane fares to Lewis and Clark County cost between €1,097 and €1,541. The early bird catches the worm, so secure a terrific deal today.
What is the best time to go to Lewis and Clark County?
Helena, Lewis and Clark County's leading city, is a superb location to tour around at anytime. Not a fan of cooler weather? Then travel here from June 20 onward during the summer months, when temperatures range from 7ºC to 24ºC. March, May and July is when Helena is at its busiest.
What months are the cheapest to book a flight to Lewis and Clark County?
Snap up a ticket in February for the lowest-priced flights to Lewis and Clark County. December is normally the most expensive time to purchase a fare.

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About Lewis and Clark County

Expedia offers flights to Lewis and Clark County to meet every traveller's needs. Whatever your flight need - Expedia has the flight for you. So choose from flights to Lewis and Clark County or destinations around the world and discover how easy it is to make your flight reservations on Expedia.
About Lewis and Clark County
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