Billings (BIL) to Seattle (SEA)
Flight time
≈ 2h 07m
Bearing
285° W
Billings (BIL) to Seattle (SEA) is 662 miles (1,066 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies BIL–SEA
US DOT T-100 · filed dataIn April 2026, Horizon Air was the only carrier flying nonstop BIL–SEA; the Embraer E175 was the most common aircraft at 100% of departures; flights ran 81% full.
Departures
120
April 2026
Seats
9,120
both directions
Passengers
7,430
both directions
Load factor
81.5%
passengers ÷ seats
Who flies BIL–SEA?
Horizon Air was the only carrier to fly nonstop BIL–SEA in April 2026 (120 departures).
- QX
Horizon Air
120 departures · 9,120 seats
Share of departures100.0%81.5%
Load
What plane flies BIL–SEA?
In April 2026, the Embraer E175 flew 100% of BIL–SEA departures.
- Embraer E175
120 departures · 81.5% load
100.0%
How has BIL–SEA traffic changed?
Nonstop BIL–SEA departures fell from 157 in May 2025 to 120 in April 2026.
Monthly nonstop BIL–SEA traffic, trailing 12 months through April 2026. Bars scale to the busiest month; months with no filed service show as zero.
May 2025
157 departures · 10,523 passengers
88.2%
Load
June 2025
182 departures · 12,379 passengers
88.3%
Load
July 2025
182 departures · 12,294 passengers
88.9%
Load
August 2025
178 departures · 12,176 passengers
90.0%
Load
September 2025
164 departures · 10,660 passengers
85.5%
Load
October 2025
176 departures · 10,918 passengers
81.6%
Load
November 2025
159 departures · 9,772 passengers
76.5%
Load
December 2025
122 departures · 8,010 passengers
86.4%
Load
January 2026
123 departures · 7,374 passengers
78.9%
Load
February 2026
111 departures · 6,740 passengers
79.9%
Load
March 2026
116 departures · 7,373 passengers
83.6%
Load
April 2026
120 departures · 7,430 passengers
81.5%
Load
By direction
The DOT files each direction separately — they rarely match.
BIL → SEA
82.2% full
60 departures · 3,747 passengers
SEA → BIL
80.8% full
60 departures · 3,683 passengers
Nonstop BIL–SEA 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
Frequently asked
How far is Billings (BIL) from Seattle (SEA)?
BIL to SEA is 662 miles (1,066 km / 575 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from BIL to SEA?
A nonstop covers the 662-mile great-circle distance in roughly 2h 07m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies BIL–SEA?
In April 2026, the Embraer E175 flew the largest share of departures (100.0%).
What mileage do I earn flying BIL–SEA?
Distance-based programs credit off the 662-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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