Cheap flights from Casper to Boise

One-way fares from $380 · CPR → BOI · prices found by travellers in the last 48 hours

Compare all dates Boise → Casper
Cheapest fare
$380

United Airlines · Sat, Nov 14

Cheapest month
November

from $380

Direct flights
Not recently

Usually 1+ stop

Quickest trip
3h 30m

790 km

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Cheapest month to fly from Casper to Boise

Lowest one-way fare per person in each month. Choose a month to see every date.

  1. November 2026 Cheapest $380

Cheapest dates in November 2026

The lowest fares we've seen for each day, cheapest first.

United Airlines
Depart08:20 Sat, Nov 14CPR → BOI 3h 47m · 1 stop
$380one way, per person
View deal
See every date in November 2026 →

Plan the rest of your trip to Boise

Where to stay, what to do and getting around, from our travel partners.

Where to stay

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Things to do

Things to do in BoiseTours, attractions and day trips on Klook Explore →

Getting around

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About flights from Casper to Boise

Casper (CPR) and Boise (BOI) are about 790 km apart. We haven't seen direct fares on this route recently, so expect at least one stop; the quickest journey we've seen takes about 3h 30m. Over the next few months, one-way fares start from $380, and November 2026 is currently the cheapest month to fly.

These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.

Frequently asked questions

How much is a flight from Casper to Boise?

The cheapest one-way fare we've seen recently is $380 with United Airlines, departing Saturday, November 14, 2026.

What is the cheapest month to fly from Casper to Boise?

November 2026 currently has the lowest fares, from $380 one way.

Are there direct flights from Casper to Boise?

We haven't seen direct fares recently, so most journeys include at least one stop.

How long is the flight from Casper to Boise?

The quickest journey we've seen takes about 3h 30m. Casper and Boise are around 790 km apart.

Which airlines fly from Casper to Boise?

Recent fares on this route were with United Airlines.

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