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276 km · Domestic

Tri Cities (PSC) – Seattle–Tacoma (SEA)

In July 2026, 186 flights operated between Tri Cities and Seattle–Tacoma (both directions), and 88.7% 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
January305292▼ 4.3%
February243272▲ 11.9%
March266258▼ 3.0%
April293218▼ 25.6%
May467260▼ 44.3%
June383193▼ 49.6%
July370186▼ 49.7%
August356––
September334––
October422–in progress
November312––
December317––
Year to date (Jan–Jul)2,3271,679▼ 27.8%

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
January82.6%84.6%▲ 2.4%
February74.9%86.4%▲ 15.4%
March88.3%86.8%▼ 1.7%
April89.4%83.9%▼ 6.2%
May90.4%85.4%▼ 5.5%
June82.2%92.2%▲ 12.2%
July85.7%88.7%▲ 3.5%
August90.7%––
September88.0%––
October88.4%–in progress
November90.1%––
December85.8%––
Year-to-date average (Jan–Jul)84.8%86.9%▲ 2.4%

Cancelled flights by month

The most recent periods19 periods
PeriodCancelled flights 2025Cancelled flights 2026Change vs last year
January01–
February13▲ 200.0%
March06–
April00–
May30▼ 100.0%
June00–
July00–
August4––
September0––
October4–in progress
November14––
December1––
Year to date (Jan–Jul)410▲ 150.0%

Airlines on this route

  1. SkyWest Airlines 83.8%
  2. Alaska Airlines 16.2%

Oct 1, 2024 – Jul 31, 2026

By direction

PSC → SEA

Scheduled flights
3,327
Flights operated
3,308
Cancelled
19 · 0.6%
On-time departures
88.9%

SEA → PSC

Scheduled flights
3,326
Flights operated
3,305
Cancelled
21 · 0.6%
On-time departures
84.8%

PSC → SEA and SEA → PSC counted separately.

Airlines on this route

Oct 1, 2024 – Jul 31, 2026
AirlineScheduled flights Share On-time departures Cancelled
SkyWest Airlines OO 5,576 83.8% 88.2% 24
Alaska Airlines AS 1,077 16.2% 79.9% 16

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 delay09:00–10:001.0min · 718 recorded · 718 measured
Gap to highest-delay hour13.4min09:00 ↔ 21:00
Recorded flights6,653PSC–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 · 94.7% · 583 recorded · 581 measured · Source: the US BTS 06:00 · 94.7% · 300 recorded · 300 measured · Source: the US BTS 07:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 08:00 · 87.3% · 414 recorded · 409 measured · Source: the US BTS 09:00 · 91.4% · 718 recorded · 718 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 152 recorded · 152 measured · Source: the US BTS 11:00 · 83.0% · 616 recorded · 607 measured · Source: the US BTS 12:00 · 85.6% · 203 recorded · 202 measured · Source: the US BTS 13:00 · 86.4% · 603 recorded · 594 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 75 recorded · 75 measured · Source: the US BTS 15:00 · 87.2% · 748 recorded · 747 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 129 recorded · 129 measured · Source: the US BTS 17:00 · 88.1% · 715 recorded · 713 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 80 recorded · 80 measured · Source: the US BTS 19:00 · 84.0% · 330 recorded · 325 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 173 recorded · 172 measured · Source: the US BTS 21:00 · 87.1% · 264 recorded · 263 measured · Source: the US BTS 22:00 · 80.6% · 476 recorded · 474 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 74 recorded · 72 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 · 5.3 min · 583 recorded · 581 measured · Source: the US BTS 06:00 · 4.7 min · 300 recorded · 300 measured · Source: the US BTS 07:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 08:00 · 4.4 min · 414 recorded · 409 measured · Source: the US BTS 09:00 · 1.0 min · 718 recorded · 718 measured · Source: the US BTS 10:00 · Fewer than 200 measured departures · 152 recorded · 152 measured · Source: the US BTS 11:00 · 5.9 min · 616 recorded · 607 measured · Source: the US BTS 12:00 · 3.0 min · 203 recorded · 202 measured · Source: the US BTS 13:00 · 4.1 min · 603 recorded · 594 measured · Source: the US BTS 14:00 · Fewer than 200 measured departures · 75 recorded · 75 measured · Source: the US BTS 15:00 · 4.2 min · 748 recorded · 747 measured · Source: the US BTS 16:00 · Fewer than 200 measured departures · 129 recorded · 129 measured · Source: the US BTS 17:00 · 2.5 min · 715 recorded · 713 measured · Source: the US BTS 18:00 · Fewer than 200 measured departures · 80 recorded · 80 measured · Source: the US BTS 19:00 · 6.6 min · 330 recorded · 325 measured · Source: the US BTS 20:00 · Fewer than 200 measured departures · 173 recorded · 172 measured · Source: the US BTS 21:00 · 14.4 min · 264 recorded · 263 measured · Source: the US BTS 22:00 · 9.7 min · 476 recorded · 474 measured · Source: the US BTS 23:00 · Fewer than 200 measured departures · 74 recorded · 72 measured · Source: the US BTS

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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 · 583 · 583 recorded · 581 measured · Source: the US BTS 06:00 · 300 · 300 recorded · 300 measured · Source: the US BTS 07:00 · No observations · 0 recorded · 0 measured · Source: the US BTS 08:00 · 414 · 414 recorded · 409 measured · Source: the US BTS 09:00 · 718 · 718 recorded · 718 measured · Source: the US BTS 10:00 · 152 · 152 recorded · 152 measured · Source: the US BTS 11:00 · 616 · 616 recorded · 607 measured · Source: the US BTS 12:00 · 203 · 203 recorded · 202 measured · Source: the US BTS 13:00 · 603 · 603 recorded · 594 measured · Source: the US BTS 14:00 · 75 · 75 recorded · 75 measured · Source: the US BTS 15:00 · 748 · 748 recorded · 747 measured · Source: the US BTS 16:00 · 129 · 129 recorded · 129 measured · Source: the US BTS 17:00 · 715 · 715 recorded · 713 measured · Source: the US BTS 18:00 · 80 · 80 recorded · 80 measured · Source: the US BTS 19:00 · 330 · 330 recorded · 325 measured · Source: the US BTS 20:00 · 173 · 173 recorded · 172 measured · Source: the US BTS 21:00 · 264 · 264 recorded · 263 measured · Source: the US BTS 22:00 · 476 · 476 recorded · 474 measured · Source: the US BTS 23:00 · 74 · 74 recorded · 72 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———
05:0094.7%5.3 min581583
06:0094.7%4.7 min300300
07:00No observations———
08:0087.3%4.4 min409414
09:0091.4%1.0 min718718
10:00Fewer than 200 measured departures—152152
11:0083.0%5.9 min607616
12:0085.6%3.0 min202203
13:0086.4%4.1 min594603
14:00Fewer than 200 measured departures—7575
15:0087.2%4.2 min747748
16:00Fewer than 200 measured departures—129129
17:0088.1%2.5 min713715
18:00Fewer than 200 measured departures—8080
19:0084.0%6.6 min325330
20:00Fewer than 200 measured departures—172173
21:0087.1%14.4 min263264
22:0080.6%9.7 min474476
23:00Fewer than 200 measured departures—7274

Day of week

On-time departures Partial coverage: only airlines that report on-time data to the US DOT
Monday · 87.1% · 997 recorded · 994 measured · Source: the US BTS Tuesday · 88.9% · 922 recorded · 918 measured · Source: the US BTS Wednesday · 87.2% · 902 recorded · 898 measured · Source: the US BTS Thursday · 86.6% · 971 recorded · 964 measured · Source: the US BTS Friday · 86.4% · 997 recorded · 982 measured · Source: the US BTS Saturday · 86.0% · 884 recorded · 877 measured · Source: the US BTS Sunday · 85.9% · 980 recorded · 980 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 · 4.4 min · 997 recorded · 994 measured · Source: the US BTS Tuesday · 3.8 min · 922 recorded · 918 measured · Source: the US BTS Wednesday · 5.3 min · 902 recorded · 898 measured · Source: the US BTS Thursday · 5.8 min · 971 recorded · 964 measured · Source: the US BTS Friday · 5.2 min · 997 recorded · 982 measured · Source: the US BTS Saturday · 4.3 min · 884 recorded · 877 measured · Source: the US BTS Sunday · 7.8 min · 980 recorded · 980 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 · 997 · 997 recorded · 994 measured · Source: the US BTS Tuesday · 922 · 922 recorded · 918 measured · Source: the US BTS Wednesday · 902 · 902 recorded · 898 measured · Source: the US BTS Thursday · 971 · 971 recorded · 964 measured · Source: the US BTS Friday · 997 · 997 recorded · 982 measured · Source: the US BTS Saturday · 884 · 884 recorded · 877 measured · Source: the US BTS Sunday · 980 · 980 recorded · 980 measured · Source: the US BTS

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View the figures
Day of weekOn-time departuresAverage departure delayWith departure timeRecorded flights
Monday87.1%4.4 min994997
Tuesday88.9%3.8 min918922
Wednesday87.2%5.3 min898902
Thursday86.6%5.8 min964971
Friday86.4%5.2 min982997
Saturday86.0%4.3 min877884
Sunday85.9%7.8 min980980

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 · 83.6% · 598 recorded · 597 measured · Source: the US BTS Feb · 81.0% · 519 recorded · 515 measured · Source: the US BTS Mar · 87.6% · 530 recorded · 524 measured · Source: the US BTS Apr · 87.1% · 511 recorded · 511 measured · Source: the US BTS May · 88.6% · 730 recorded · 727 measured · Source: the US BTS Jun · 85.6% · 576 recorded · 576 measured · Source: the US BTS Jul · 86.7% · 556 recorded · 556 measured · Source: the US BTS Aug · 90.7% · 360 recorded · 356 measured · Source: the US BTS Sep · 88.0% · 334 recorded · 334 measured · Source: the US BTS Oct · 89.7% · 606 recorded · 602 measured · Source: the US BTS Nov · 89.7% · 636 recorded · 621 measured · Source: the US BTS Dec · 85.2% · 697 recorded · 694 measured · Source: the US BTS

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Average departure delay Partial coverage: only airlines that report on-time data to the US DOT
Jan · 12.3 min · 598 recorded · 597 measured · Source: the US BTS Feb · 10.7 min · 519 recorded · 515 measured · Source: the US BTS Mar · 6.5 min · 530 recorded · 524 measured · Source: the US BTS Apr · 3.6 min · 511 recorded · 511 measured · Source: the US BTS May · 1.8 min · 730 recorded · 727 measured · Source: the US BTS Jun · 4.3 min · 576 recorded · 576 measured · Source: the US BTS Jul · 3.1 min · 556 recorded · 556 measured · Source: the US BTS Aug · 1.3 min · 360 recorded · 356 measured · Source: the US BTS Sep · 1.8 min · 334 recorded · 334 measured · Source: the US BTS Oct · 3.6 min · 606 recorded · 602 measured · Source: the US BTS Nov · 3.6 min · 636 recorded · 621 measured · Source: the US BTS Dec · 8.2 min · 697 recorded · 694 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 · 598 · 598 recorded · 597 measured · Source: the US BTS Feb · 519 · 519 recorded · 515 measured · Source: the US BTS Mar · 530 · 530 recorded · 524 measured · Source: the US BTS Apr · 511 · 511 recorded · 511 measured · Source: the US BTS May · 730 · 730 recorded · 727 measured · Source: the US BTS Jun · 576 · 576 recorded · 576 measured · Source: the US BTS Jul · 556 · 556 recorded · 556 measured · Source: the US BTS Aug · 360 · 360 recorded · 356 measured · Source: the US BTS Sep · 334 · 334 recorded · 334 measured · Source: the US BTS Oct · 606 · 606 recorded · 602 measured · Source: the US BTS Nov · 636 · 636 recorded · 621 measured · Source: the US BTS Dec · 697 · 697 recorded · 694 measured · Source: the US BTS

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View the figures
Month of yearOn-time departuresAverage departure delayWith departure timeRecorded flights
Jan83.6%12.3 min597598
Feb81.0%10.7 min515519
Mar87.6%6.5 min524530
Apr87.1%3.6 min511511
May88.6%1.8 min727730
Jun85.6%4.3 min576576
Jul86.7%3.1 min556556
Aug90.7%1.3 min356360
Sep88.0%1.8 min334334
Oct89.7%3.6 min602606
Nov89.7%3.6 min621636
Dec85.2%8.2 min694697

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 86.3% 5,744
  • Delayed >15 min 13.1% 869
  • Cancelled 0.6% 40
  • 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

51
51 of 51
Flight numbersBy direction DeparturesOn time
OO4017 SEA → PSC 657 84.9%
OO3972 PSC → SEA 463 94.4%
OO3992 SEA → PSC 463 90.3%
OO3891 SEA → PSC 409 84.8%
OO3992 PSC → SEA 369 88.3%
AS1023 PSC → SEA 243 84.2%
AS1022 SEA → PSC 239 75.1%
OO3607 PSC → SEA 195 95.9%
OO3608 SEA → PSC 195 93.9%
OO3625 PSC → SEA 195 96.9%
OO3605 SEA → PSC 188 91.0%
OO3628 PSC → SEA 185 91.9%
AS795 PSC → SEA 86 91.8%
OO3891 PSC → SEA 85 90.6%
OO3408 SEA → PSC 76 88.6%
OO3408 PSC → SEA 76 88.6%
AS908 SEA → PSC 69 67.2%
AS909 PSC → SEA 69 65.7%
OO3020 PSC → SEA 69 82.6%
OO3316 PSC → SEA 68 100.0%
OO3317 PSC → SEA 68 83.8%
OO3317 SEA → PSC 68 91.2%
OO3319 SEA → PSC 68 75.0%
OO3371 SEA → PSC 68 89.7%
AS906 SEA → PSC 67 89.4%
AS907 PSC → SEA 66 90.8%
OO4120 PSC → SEA 62 87.1%
OO3280 SEA → PSC 61 68.9%
AS771 SEA → PSC 56 68.5%
AS772 PSC → SEA 56 83.9%
OO3440 PSC → SEA 56 83.9%
OO3440 SEA → PSC 55 85.5%
OO4095 PSC → SEA 55 89.1%
AS794 SEA → PSC 52 86.3%
OO3866 PSC → SEA 50 84.0%
OO3353 SEA → PSC 49 79.6%
OO3280 PSC → SEA 45 68.9%
OO3353 PSC → SEA 43 69.8%
OO3351 SEA → PSC 42 92.9%
OO3351 PSC → SEA 41 90.2%
OO4023 PSC → SEA 36 91.4%
OO3026 PSC → SEA 35 94.1%
AS212 SEA → PSC 33 87.5%
OO3020 SEA → PSC 33 78.1%
OO3739 PSC → SEA 33 87.9%
OO3666 PSC → SEA 32 90.6%
OO4082 PSC → SEA 32 100.0%
OO3661 PSC → SEA 31 90.3%
OO3890 PSC → SEA 31 87.1%
OO3955 SEA → PSC 31 90.3%
OO3955 PSC → SEA 31 90.3%

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 186 −49.7% 0 88.7%
June 2026 193 −49.6% 0 92.2%
May 2026 260 −44.3% 0 85.4%
April 2026 218 −25.6% 0 83.9%
March 2026 258 −3.0% 6 86.8%
February 2026 272 +11.9% 3 86.4%
January 2026 292 −4.3% 1 84.6%
December 2025 317 −15.9% 1 85.8%
November 2025 312 +1.0% 14 90.1%
October 2025 422 +134.4% 4 88.4%
September 2025 334 0 88.0%
August 2025 356 4 90.7%
July 2025 370 0 85.7%
June 2025 383 0 82.2%
May 2025 467 3 90.4%
April 2025 293 0 89.4%
March 2025 266 0 88.3%
February 2025 243 1 74.9%
January 2025 305 0 82.6%
December 2024 377 2 84.6%
November 2024 309 1 89.3%
October 2024 180 0 92.8%

How to read this chart

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