We've gone through lots of different flights, to help you find the cheapest way to get from London Heathrow to Butte. You can choose from zero airlines.
If you can't find a flight time that suits you, why not look at flying out from a different airport?
Take a look at flight times to see which one works best for you.
You can also search by month, which will reveal the cheapest time of the week to fly.
