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Route · SEA → GEG · 2020–2025 BTS data

Seattle to Spokane

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SEA to GEG (Seattle to Spokane) ranks #105 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

83.3%
On-time
+4.3 pts
vs US avg
59 min
Delay when late
31,686
Flights
#105 of 4927
Corpus placement

Cancelled

0.6%

Best Month

Oct 2025 89%

Worst Month

Jul 2025 70%

Distance

224 mi

Carriers

21

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 395 87 3 1 DL,AS,OO
Nov 2025 423 49 14 0 OO,DL,AS
Oct 2025 451 49 4 0 AS,DL,OO
Sep 2025 462 77 1 0 OO,DL,AS
Aug 2025 513 131 3 0 OO,AS,DL
Jul 2025 544 162 5 1 AS,DL,OO
Jun 2025 471 136 0 0 AS,OO,DL
May 2025 453 108 1 0 AS,OO,DL
Apr 2025 410 64 1 0 DL,OO,AS
Mar 2025 424 82 0 0 AS,OO,DL
Feb 2025 379 111 2 0 AS,OO,DL
Jan 2025 397 83 0 1 AS,DL,OO
Dec 2024 436 103 2 0 AS,DL,OO
Nov 2024 477 85 1 0 OO,AS,DL
Oct 2024 450 76 0 1 AS,OO,DL
Sep 2024 454 92 0 0 OO,AS,DL
Aug 2024 453 120 0 0 AS,DL,OO
Jul 2024 433 83 6 0 AS,DL,OO
Jun 2024 403 103 0 0 AS,DL,OO
May 2024 430 76 0 0 AS,DL,OO
Apr 2024 437 68 2 0 AS,DL,OO
Mar 2024 434 86 0 1 AS,DL,OO
Feb 2024 386 58 0 0 AS,DL,OO
Jan 2024 396 112 21 1 AS,DL,OO

SEA–GEG seasonal on-time pattern

Best: October (88.0%) · weakest: December (75.4%)

70%75%80%85%90% JanFebMarAprMayJunJulAugSepOctNovDec 75.4%

Strongest calendar month

October

88.0% on-time · ~484 flights/mo

Busiest calendar month

September

~506 flights/mo avg

Weakest calendar month

December

75.4% on-time · ~414 flights/mo

Cancellation Rate

0.6%

66 of 10,511 flights

Diversion Rate

0.1%

6 of 10,511 flights

Explore origin & destination

On-time and delay data for the airports this route connects.

SEA - Seattle

Full on-time, delay-cause, and seasonal performance for Seattle, WA.

SEA on-time profile

GEG - Spokane

Full on-time, delay-cause, and seasonal performance for Spokane, WA.

GEG on-time profile

Compare the two airports

See SEA and GEG side by side on delays, cancellations, and reliability.

Compare SEA vs GEG

Origin-hub reliability standing

Mid-pack among SEA departures

From SEA, this corridor sits with 63 other 75–85% on-time routes out of 89 tracked departures, not the hub's reliability leaders (25 at ≥85%) and not the softest ( 1 below 75%). Destination: Spokane · fleet on-time rank #1853 of 4927.

What the Data Says About SEA to GEG

Bureau of Transportation Statistics records show Seattle to Spokane (SEA to GEG) running a 83.3% on-time rate over 31,686 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 58.7 minutes. The 224-mile corridor is served by 21 carriers, and over the last 24 months 0.6% of 10,511 flights were cancelled, 0.1% diverted.

The monthly split is wide on this route: Oct 2025 posted the strongest performance at 89% on-time, while Jul 2025 came in at just 70% - a 19-point swing worth factoring into travel timing.

On the multi-year calendar, SEA–GEG peaks in October at 88.0% on-time while September carries the heaviest traffic (~506 flights per month) ; the softest month is December at 75.4%, a 12.6-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SEA to GEG rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SEA to GEG ranks #105 of 4927 tracked domestic routes by total flights (most flights = #1). That ordinal matches our busiest-routes listing (total_flights DESC). See /methodology#corpus-placement for the exact sort basis.
How often are flights delayed from SEA to GEG? ▼
Flights from Seattle to Spokane have a 83.3% on-time rate based on 31,686 flights. The average delay is 58.7 minutes. The best recent month was Oct 2025 with 89% on-time.
What is the cancellation rate for SEA to GEG? ▼
Over the last 24 months, 0.6% of flights on this route were cancelled (66 of 10,511 flights) and 0.1% were diverted.
How far is the flight from SEA to GEG? ▼
The flight distance from Seattle (SEA) to Spokane (GEG) is approximately 224 miles. This route is served by 21 carriers.
When is the best time to fly from SEA to GEG? ▼
The best recent month for on-time performance was Oct 2025 (89% on-time). The worst was Jul 2025 (70% on-time). Consider booking during months with historically better performance.

Airports on this route

SEA Airport

Seattle
GEG Airport

Spokane
Data source

Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.

Read our methodology - how this data is sourced, computed, and verified.

Using SEA–GEG data

SEA–GEG runs 4.3 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare SEA and GEG airport profiles: delay causes and top routes differ even on the same corridor. SEA airport
  • If your dates flex, October (88.0% on-time) beats December (75.4%) on this corridor. Seasonal chart
  • 4 other routes post a similar 83.3% on-time rate; compare before you commit to this pairing. Similar routes

On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.

Data sourced from U.S. Department of Transportation Bureau of Transportation Statistics (BTS) On-Time Performance data. See our methodology for details. Retrieved and formatted by PlainFlights

Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.