Your next trip, last seen at €100
When to fly
Explore datesMore dates worth a look
Find the dates that work for you
The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.
One-way fare
- Lowest observed
- €100, departing 13 Jan 2027 (Last checked: 27 Oct 2026)One-way fareCheck live prices for this route
- Airlines seen
- United Airlines, Southwest Airlines, Alaska Airlines, American Airlines, Delta Air Lines, Frontier Airlines
- Reported fastest flight
- 1h 45m
- Non-stop
- Yes
About this route
Explore the fares we observed from Boise to Denver. Prices move often, so pick your dates to see the latest options.
- Route distance
- 1,025 km
- Reported fastest flight
- 1h 45m
- Alternative airports
- APA
Route-level information; individual journeys vary.
Published schedules report non-stop service with United Airlines, Southwest Airlines. Check current timetables.
A clearer picture of your fare
Non-stop airlines seen on this route
| Airline | Non-stop days / priced days | Fastest non-stop |
|---|---|---|
| United Airlines | 5 / 84 |
Departure days with a non-stop fare checked in the last 14 days. A carrier listed here had a non-stop fare on at least 3 days; schedules may differ.
Airport to city: straight-line distance
- Boise Air Terminal/Gowen Field (BOI) → Boise, city gazetteer reference point (43.6150, -116.2023): ≈ 6 km.
- Denver International Airport (DEN) → Denver, city gazetteer reference point (39.7392, -104.9847): ≈ 30 km.
Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.
Lowest one-way fare we saw per airline
Cheapest airline from Boise to Denver: Frontier Airlines, from €80 (checked 20 Oct 2026).
| Airline | Lowest fare | Priced days |
|---|---|---|
| Frontier Airlines | €80Jan 11, 2027 | 34 |
| Alaska Airlines | €102Dec 16, 2026 | 45 |
| United Airlines | €148Nov 17, 2026 | 5 |
One-way fares checked in the last 14 days. An airline listed here had a fare on at least 3 departure days. Each figure is the lowest we saw, not a guaranteed fare. Connecting itineraries are included; the date is the departure day of that fare.
Frequently asked
How much is a flight from Boise to Denver?
The lowest fare Routavio has observed is €100, found on 27 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from Boise to Denver?
In our observations January 2027 is the cheapest month so far, at €100.
Are there direct flights from Boise to Denver?
Yes. Published schedules report non-stop flights on this route with United Airlines, Southwest Airlines.
Which airlines fly from Boise to Denver?
Routavio has seen these carriers on the route: United Airlines, Southwest Airlines, Alaska Airlines, American Airlines, Delta Air Lines, Frontier Airlines.
How long does the flight from Boise to Denver take?
Across the 86 fares Routavio observed, the average journey time is 8h 41m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
How many of the observed Boise to Denver fares were non-stop?
4 of the 88 fares we observed were non-stop; the rest included at least one stop. That describes our observations, not every flight that operates.
Which airlines had non-stop offers on at least 3 departure dates from Boise to Denver?
For Boise to Denver, examples of observed one-way non-stop offers checked within the last 14 days: United Airlines (5). Each number counts distinct departure dates, not weekly flights; check current availability in search.
Which airline has the lowest fare from Boise to Denver?
Cheapest airline from Boise to Denver: Frontier Airlines, from €80 (checked 20 Oct 2026).
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide
Keep exploring
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Recently observed fares. Prices may change.
Last checked: 27 Oct 2026