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Boise (BOI) to Denver (DEN)

648mi
1,042 km563 nm

Flight time

≈ 2h 06m

Bearing

109° E

Boise (BOI) to Denver (DEN) is 648 miles (1,042 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.

Route map: BOI → DENBOIDEN

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What actually flies BOI–DEN

US DOT T-100 · filed data

In April 2026, Southwest Airlines operated the most departures, one of 4 carriers flying nonstop BOI–DEN; the Embraer E175 was the most common aircraft at 29% of departures; flights ran 84% full.

Departures

498

April 2026

Seats

63,524

both directions

Passengers

53,498

both directions

Load factor

84.2%

passengers ÷ seats

Who flies BOI–DEN?

Southwest Airlines operated the most nonstop BOI–DEN departures in April 2026 (184), one of 4 carriers on the route.

  • WN

    Southwest Airlines

    184 departures · 28,970 seats

    84.8%

    Load

  • OO

    SkyWest Airlines

    182 departures · 13,142 seats

    82.1%

    Load

  • UA

    United Airlines

    120 departures · 18,876 seats

    89.3%

    Load

  • F9

    Frontier Airlines

    12 departures · 2,536 seats

    51.1%

    Load

What plane flies BOI–DEN?

In April 2026, the Embraer E175 flew 29% of BOI–DEN departures — more than any other aircraft type.

How has BOI–DEN traffic changed?

Nonstop BOI–DEN departures fell from 517 in May 2025 to 498 in April 2026.

Monthly nonstop BOI–DEN traffic, trailing 12 months through April 2026. Bars scale to the busiest month; months with no filed service show as zero.

  • May 2025

    517 departures · 65,990 passengers

    88.3%

    Load

  • June 2025

    511 departures · 69,521 passengers

    88.5%

    Load

  • July 2025

    522 departures · 69,021 passengers

    87.4%

    Load

  • August 2025

    522 departures · 65,103 passengers

    85.3%

    Load

  • September 2025

    505 departures · 60,764 passengers

    86.8%

    Load

  • October 2025

    522 departures · 61,717 passengers

    88.1%

    Load

  • November 2025

    490 departures · 54,619 passengers

    82.9%

    Load

  • December 2025

    523 departures · 57,602 passengers

    82.0%

    Load

  • January 2026

    522 departures · 51,094 passengers

    72.4%

    Load

  • February 2026

    472 departures · 49,589 passengers

    78.4%

    Load

  • March 2026

    512 departures · 58,389 passengers

    86.3%

    Load

  • April 2026

    498 departures · 53,498 passengers

    84.2%

    Load

By direction

The DOT files each direction separately — they rarely match.

DEN → BOI

83.9% full

250 departures · 27,321 passengers

BOI → DEN

84.6% full

248 departures · 26,177 passengers

Nonstop BOI–DEN traffic has been filed with the US DOT since 2025.

Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through April 2026; filings from 2025. Public domain (US Government work). The DOT publishes roughly three months in arrears.

The airports

BOI

Boise

US

Boise Air Terminal/Gowen Field

Coordinates

43.56°N, 116.22°W

Hemisphere

N · W

DEN

Denver

US

Denver International Airport

Coordinates

39.86°N, 104.67°W

Hemisphere

N · W

Frequently asked

How far is Boise (BOI) from Denver (DEN)?

BOI to DEN is 648 miles (1,042 km / 563 nautical miles) measured great-circle — the shortest path over the surface of the Earth.

How long is the flight from BOI to DEN?

A nonstop covers the 648-mile great-circle distance in roughly 2h 06m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.

What plane flies BOI–DEN?

In April 2026, the Embraer E175 flew the largest share of departures (28.9%), followed by the Boeing 737-700 (17.1%).

What mileage do I earn flying BOI–DEN?

Distance-based programs credit off the 648-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.

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