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624 km · Domestic

Missoula Montana (MSO) – Seattle–Tacoma (SEA)

In July 2026, 133 flights operated between Missoula Montana and Seattle–Tacoma (both directions), and 85.0% left on time, according to the US BTS.

Official · July 2026 according to the US BTS only airlines required to report on-time data to the US DOT

Flights per month

Only complete months are shown. A month appears once the source has published every day of it.

The most recent periods19 periods
PeriodFlights operated 2025Flights operated 2026Change vs last year
January60120▲ 100.0%
February4978▲ 59.2%
March56112▲ 100.0%
April60145▲ 141.7%
May6297▲ 56.5%
June60154▲ 156.7%
July62133▲ 114.5%
August62––
September50––
October73–in progress
November114––
December123––
Year to date (Jan–Jul)409839▲ 105.1%

On-time departures by month

Departures within 15 minutes of schedule.

The most recent periods19 periods
PeriodOn-time departures 2025On-time departures 2026Change vs last year
January68.3%88.3%▲ 29.3%
February61.2%93.6%▲ 52.9%
March66.1%77.7%▲ 17.5%
April78.3%87.6%▲ 11.9%
May64.5%90.7%▲ 40.6%
June80.0%83.8%▲ 4.7%
July62.9%85.0%▲ 35.1%
August59.7%––
September86.0%––
October87.7%–in progress
November87.7%––
December82.1%––
Year-to-date average (Jan–Jul)68.8%86.7%▲ 26.1%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January24▲ 100.0%
February30▼ 100.0%
March02–
April01–
May00–
June00–
July00–
August0––
September0––
October0–in progress
November4––
December0––
Year to date (Jan–Jul)57▲ 40.0%

Airlines on this route

  1. Alaska Airlines 89.4%
  2. SkyWest Airlines 10.6%

Oct 1, 2024 – Jul 31, 2026

By direction

MSO → SEA

Scheduled flights
926
Flights operated
917
Cancelled
9 · 1.0%
On-time departures
81.5%

SEA → MSO

Scheduled flights
906
Flights operated
899
Cancelled
7 · 0.8%
On-time departures
79.5%

MSO → SEA and SEA → MSO counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
Alaska Airlines AS 1,637 89.4% 79.3% 16
SkyWest Airlines OO 195 10.6% 90.8% 0

Shares are of scheduled flights in the period shown. Codeshare flights are counted once, under the operating airline.

Flight timing & delays

Historical departures, grouped by the scheduled local time at the departure airport. These are recorded outcomes, not a forecast for your flight.

Times are local to the departure airport of each flight; both directions are combined.

US domestic sectors recorded by BTS

Source: the US BTS · Oct 12, 2024 → Jul 31, 2026

Lowest average delay16:00–17:005.7min · 258 recorded · 254 measured
Gap to highest-delay hour8.6min16:00 ↔ 14:00
Recorded flights1,832MSO–SEA

Departure hour

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · Fewer than 200 measured departures · 142 recorded · 142 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 89 recorded · 87 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 52 recorded · 52 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 35 recorded · 35 measured · Source: the US BTS 10:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 11:00 · 78.6% · 282 recorded · 280 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 186 recorded · 184 measured · Source: the US BTS 13:00 · 83.0% · 219 recorded · 218 measured · Source: the US BTS 14:00 · 67.9% · 212 recorded · 209 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 65 recorded · 65 measured · Source: the US BTS 16:00 · 79.9% · 258 recorded · 254 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 62 recorded · 62 measured · Source: the US BTS 18:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 19:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · 79.0% · 230 recorded · 228 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · Fewer than 200 measured departures · 142 recorded · 142 measured · Source: the US BTS 07:00 · Fewer than 200 measured departures · 89 recorded · 87 measured · Source: the US BTS 08:00 · Fewer than 200 measured departures · 52 recorded · 52 measured · Source: the US BTS 09:00 · Fewer than 200 measured departures · 35 recorded · 35 measured · Source: the US BTS 10:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 11:00 · 8.7 min · 282 recorded · 280 measured · Source: the US BTS 12:00 · Fewer than 200 measured departures · 186 recorded · 184 measured · Source: the US BTS 13:00 · 6.9 min · 219 recorded · 218 measured · Source: the US BTS 14:00 · 14.2 min · 212 recorded · 209 measured · Source: the US BTS 15:00 · Fewer than 200 measured departures · 65 recorded · 65 measured · Source: the US BTS 16:00 · 5.7 min · 258 recorded · 254 measured · Source: the US BTS 17:00 · Fewer than 200 measured departures · 62 recorded · 62 measured · Source: the US BTS 18:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 19:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · 7.2 min · 230 recorded · 228 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
00:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 01:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 02:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 03:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 04:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 05:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 06:00 · 142 · 142 recorded · 142 measured · Source: the US BTS 07:00 · 89 · 89 recorded · 87 measured · Source: the US BTS 08:00 · 52 · 52 recorded · 52 measured · Source: the US BTS 09:00 · 35 · 35 recorded · 35 measured · Source: the US BTS 10:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 11:00 · 282 · 282 recorded · 280 measured · Source: the US BTS 12:00 · 186 · 186 recorded · 184 measured · Source: the US BTS 13:00 · 219 · 219 recorded · 218 measured · Source: the US BTS 14:00 · 212 · 212 recorded · 209 measured · Source: the US BTS 15:00 · 65 · 65 recorded · 65 measured · Source: the US BTS 16:00 · 258 · 258 recorded · 254 measured · Source: the US BTS 17:00 · 62 · 62 recorded · 62 measured · Source: the US BTS 18:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 19:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 20:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 21:00 · 230 · 230 recorded · 228 measured · Source: the US BTS 22:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 23:00 · No observations · 0 recorded · 0 measured · Source: the US BTS

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View the figures
Departure hourOn-time departuresAverage departure delayWith departure timeRecorded flights
00:00No observations———
01:00No observations———
02:00No observations———
03:00No observations———
04:00No observations———
05:00No observations———
06:00Fewer than 200 measured departures—142142
07:00Fewer than 200 measured departures—8789
08:00Fewer than 200 measured departures—5252
09:00Fewer than 200 measured departures—3535
10:00No observations———
11:0078.6%8.7 min280282
12:00Fewer than 200 measured departures—184186
13:0083.0%6.9 min218219
14:0067.9%14.2 min209212
15:00Fewer than 200 measured departures—6565
16:0079.9%5.7 min254258
17:00Fewer than 200 measured departures—6262
18:00No observations———
19:00No observations———
20:00No observations———
21:0079.0%7.2 min228230
22:00No observations———
23:00No observations———

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 76.8% · 269 recorded · 263 measured · Source: the US BTS Tuesday · 85.2% · 257 recorded · 257 measured · Source: the US BTS Wednesday · 85.6% · 265 recorded · 264 measured · Source: the US BTS Thursday · 77.1% · 265 recorded · 262 measured · Source: the US BTS Friday · 79.9% · 267 recorded · 263 measured · Source: the US BTS Saturday · 85.8% · 240 recorded · 239 measured · Source: the US BTS Sunday · 73.9% · 269 recorded · 268 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Monday · 7.6 min · 269 recorded · 263 measured · Source: the US BTS Tuesday · 2.8 min · 257 recorded · 257 measured · Source: the US BTS Wednesday · 5.1 min · 265 recorded · 264 measured · Source: the US BTS Thursday · 12.4 min · 265 recorded · 262 measured · Source: the US BTS Friday · 7.1 min · 267 recorded · 263 measured · Source: the US BTS Saturday · 4.4 min · 240 recorded · 239 measured · Source: the US BTS Sunday · 11.4 min · 269 recorded · 268 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Monday · 269 · 269 recorded · 263 measured · Source: the US BTS Tuesday · 257 · 257 recorded · 257 measured · Source: the US BTS Wednesday · 265 · 265 recorded · 264 measured · Source: the US BTS Thursday · 265 · 265 recorded · 262 measured · Source: the US BTS Friday · 267 · 267 recorded · 263 measured · Source: the US BTS Saturday · 240 · 240 recorded · 239 measured · Source: the US BTS Sunday · 269 · 269 recorded · 268 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday76.8%7.6 min263269
Tuesday85.2%2.8 min257257
Wednesday85.6%5.1 min264265
Thursday77.1%12.4 min262265
Friday79.9%7.1 min263267
Saturday85.8%4.4 min239240
Sunday73.9%11.4 min268269

Month of year

Months combine the same calendar month across the years shown; this is a seasonal pattern, not a monthly time series.

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Jan · Fewer than 200 measured departures · 186 recorded · 180 measured · Source: the US BTS Feb · Fewer than 200 measured departures · 130 recorded · 127 measured · Source: the US BTS Mar · Fewer than 200 measured departures · 170 recorded · 168 measured · Source: the US BTS Apr · 84.9% · 206 recorded · 205 measured · Source: the US BTS May · Fewer than 200 measured departures · 159 recorded · 159 measured · Source: the US BTS Jun · 82.7% · 214 recorded · 214 measured · Source: the US BTS Jul · Fewer than 200 measured departures · 195 recorded · 195 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 62 recorded · 62 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 50 recorded · 50 measured · Source: the US BTS Oct · Fewer than 200 measured departures · 113 recorded · 113 measured · Source: the US BTS Nov · Fewer than 200 measured departures · 176 recorded · 172 measured · Source: the US BTS Dec · Fewer than 200 measured departures · 171 recorded · 171 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Jan · Fewer than 200 measured departures · 186 recorded · 180 measured · Source: the US BTS Feb · Fewer than 200 measured departures · 130 recorded · 127 measured · Source: the US BTS Mar · Fewer than 200 measured departures · 170 recorded · 168 measured · Source: the US BTS Apr · 4.3 min · 206 recorded · 205 measured · Source: the US BTS May · Fewer than 200 measured departures · 159 recorded · 159 measured · Source: the US BTS Jun · 7.1 min · 214 recorded · 214 measured · Source: the US BTS Jul · Fewer than 200 measured departures · 195 recorded · 195 measured · Source: the US BTS Aug · Fewer than 200 measured departures · 62 recorded · 62 measured · Source: the US BTS Sep · Fewer than 200 measured departures · 50 recorded · 50 measured · Source: the US BTS Oct · Fewer than 200 measured departures · 113 recorded · 113 measured · Source: the US BTS Nov · Fewer than 200 measured departures · 176 recorded · 172 measured · Source: the US BTS Dec · Fewer than 200 measured departures · 171 recorded · 171 measured · Source: the US BTS

Hover, tap or focus a point to see its value, sample and source.

Recorded flights Partial coverage: only airlines that report on-time data to the US DOT
Jan · 186 · 186 recorded · 180 measured · Source: the US BTS Feb · 130 · 130 recorded · 127 measured · Source: the US BTS Mar · 170 · 170 recorded · 168 measured · Source: the US BTS Apr · 206 · 206 recorded · 205 measured · Source: the US BTS May · 159 · 159 recorded · 159 measured · Source: the US BTS Jun · 214 · 214 recorded · 214 measured · Source: the US BTS Jul · 195 · 195 recorded · 195 measured · Source: the US BTS Aug · 62 · 62 recorded · 62 measured · Source: the US BTS Sep · 50 · 50 recorded · 50 measured · Source: the US BTS Oct · 113 · 113 recorded · 113 measured · Source: the US BTS Nov · 176 · 176 recorded · 172 measured · Source: the US BTS Dec · 171 · 171 recorded · 171 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
JanFewer than 200 measured departures—180186
FebFewer than 200 measured departures—127130
MarFewer than 200 measured departures—168170
Apr84.9%4.3 min205206
MayFewer than 200 measured departures—159159
Jun82.7%7.1 min214214
JulFewer than 200 measured departures—195195
AugFewer than 200 measured departures—6262
SepFewer than 200 measured departures—5050
OctFewer than 200 measured departures—113113
NovFewer than 200 measured departures—172176
DecFewer than 200 measured departures—171171

Delay and on-time rates need at least 200 measured departures per bucket. Smaller samples remain visible in the flight-count chart. An empty slot means no observations, not zero flights.

Recorded outcomes

  • On time 79.8% 1,462
  • Delayed >15 min 19.3% 354
  • Cancelled 0.9% 16
  • Missing departure time 0.0% 0

All recorded flights with a known scheduled local time, counted once. Missing actual times are shown separately.

On time means departing no more than 15 minutes after schedule. Cancelled flights and flights missing departure times are excluded from the on-time rate and average delay.

Flight numbers on this route

15
15 of 15
Flight numbersBy direction DeparturesOn time
AS697 MSO → SEA 380 70.6%
AS697 SEA → MSO 380 75.9%
AS660 SEA → MSO 145 83.1%
AS660 MSO → SEA 144 86.4%
AS138 MSO → SEA 70 92.9%
AS139 SEA → MSO 70 84.1%
OO3100 MSO → SEA 52 90.4%
OO3101 SEA → MSO 52 96.2%
AS1481 MSO → SEA 47 95.7%
OO3063 MSO → SEA 35 85.7%
OO3064 SEA → MSO 35 82.9%
AS664 SEA → MSO 34 78.8%
AS665 MSO → SEA 34 96.9%
AS518 MSO → SEA 30 80.0%
AS518 SEA → MSO 30 76.7%

Flight numbers are the codes sold on tickets. On shared flights one aircraft can carry several of them. Only numbers with at least 30 flights have a page.

Monthly figures
PeriodFlights operated Change vs last yearCancelled On-time departures
July 2026 133 +114.5% 0 85.0%
June 2026 154 +156.7% 0 83.8%
May 2026 97 +56.5% 0 90.7%
April 2026 145 +141.7% 1 87.6%
March 2026 112 +100.0% 2 77.7%
February 2026 78 +59.2% 0 93.6%
January 2026 120 +100.0% 4 88.3%
December 2025 123 +156.3% 0 82.1%
November 2025 114 +96.6% 4 87.7%
October 2025 73 +82.5% 0 87.7%
September 2025 50 0 86.0%
August 2025 62 0 59.7%
July 2025 62 0 62.9%
June 2025 60 0 80.0%
May 2025 62 0 64.5%
April 2025 60 0 78.3%
March 2025 56 0 66.1%
February 2025 49 3 61.2%
January 2025 60 2 68.3%
December 2024 48 0 75.0%
November 2024 58 0 91.4%
October 2024 40 0 57.5%

How to read this chart

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