Cheap Flights from St Louis Airport to Idaho from £195 Return

Flight deals from St Louis Airport to Idaho

Looking for a cheap last-minute deal or the best return flight from St Louis Airport to Idaho? If you want to travel next month, return fares start from £261. Find the lowest prices on one-way and return tickets right here.

Boise.£195 per passenger.Departing Wed, 1 Jul, returning Tue, 7 Jul.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from St Louis on Wed, 1 Jul, arriving in Boise.Inbound indirect flight with Frontier Airlines, departs from Boise on Tue, 7 Jul, arriving in St Louis.Price includes taxes and charges.From £195, select.

Idaho Falls.£237 per passenger.Departing Thu, 4 Jun, returning Mon, 8 Jun.Return flight with Frontier Airlines and Allegiant Air.Outbound indirect flight with Frontier Airlines, departs from St Louis on Thu, 4 Jun, arriving in Idaho Falls.Inbound indirect flight with Allegiant Air, departs from Idaho Falls on Mon, 8 Jun, arriving in St Louis.Price includes taxes and charges.From £237, select.

Hailey.£310 per passenger.Departing Sat, 2 May, returning Wed, 6 May.Return flight with United.Outbound indirect flight with United, departs from St Louis on Sat, 2 May, arriving in Hailey.Inbound indirect flight with United, departs from Hailey on Wed, 6 May, arriving in St Louis.Price includes taxes and charges.From £310, select.

Lewiston.£741 per passenger.Departing Sat, 27 Jun, returning Mon, 29 Jun.Return flight with Delta.Outbound indirect flight with Delta, departs from St Louis on Sat, 27 Jun, arriving in Lewiston-Nez Perce County.Inbound indirect flight with Delta, departs from Lewiston-Nez Perce County on Mon, 29 Jun, arriving in St Louis.Price includes taxes and charges.From £741, select.

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Flying from St Louis Airport to Idaho

Arm yourself with these facts on the fly.

Cheapest flight found	£195
Cheapest month to fly	July

How to find cheap flights from St Louis Airport to Idaho

We've compared the best online travel agents and flight providers on the internet to find the cheapest plane tickets from St Louis Airport to Idaho. Other savvy travellers recently found return flights from £195 and one-way tickets from £63. Ready to join them? Here are a few tips to help you do it the smart way.

Fly in July

The cheapest time to fly from St Louis Airport to Idaho is currently July.

Flex your dates for the best rates

If you’re flexible on your departure dates, you can use Skyscanner's whole month tool to find the cheapest day of the year to fly from St Louis Airport to anywhere you choose in Idaho.

Watch as fares rise and fall

With Price Alerts, we'll let you know when flight prices from St Louis Airport to your chosen airport in Idaho go up or down so you can book when the time is just right.

Relax – these are fee-free flight tickets

With us, there are no added fees – the Idaho Airport to Idaho flight price you see when you search with us is what you pay to the provider.

Frequently asked questions

Are there any direct flights from St Louis Airport to Idaho?

There are currently no direct flights from St Louis Airport to Idaho, but we've found some other routes to United States – check them out now.

What is the average price of a flight from St Louis Airport to Idaho?

We looked at all of the upcoming return flights from St Louis Airport to Idaho we could find over the next 12 months. It looks like £195 is the best price. This is good, compared to the average Idaho ticket price of £371.

What is the cheapest month to fly from St Louis Airport to Idaho?

The cheapest month to fly from St Louis Airport to Hailey Airport is currently May.
The cheapest month to fly from St Louis Airport to Boise Airport is currently July.
The cheapest month to fly from St Louis Airport to Lewiston-Nez Perce County Airport is currently June.
And the cheapest month to fly from St Louis Airport to Idaho Falls Airport is usually June.

Which upcoming date is cheapest to fly from St Louis Airport to Idaho on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from St Louis Airport to Idaho on Wednesday, 1 July 2026.