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Route · GEG → SEA · 2020–2025 BTS data

Spokane to Seattle

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), GEG to SEA (Spokane to Seattle) ranks #104 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

86.5%
On-time
+7.5 pts
vs US avg
65 min
Delay when late
31,745
Flights
#104 of 4927
Corpus placement

Cancelled

0.7%

Best Month

Apr 2024 91%

Worst Month

Feb 2025 71%

Distance

224 mi

Carriers

20

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 396 73 4 1 DL,AS,OO
Nov 2025 424 44 14 1 OO,DL,AS
Oct 2025 447 63 3 1 AS,DL,OO
Sep 2025 436 63 0 0 OO,DL,AS
Aug 2025 504 94 3 0 OO,AS,DL
Jul 2025 544 111 5 0 AS,OO,DL
Jun 2025 472 99 0 0 AS,OO,DL
May 2025 453 89 1 1 AS,OO,DL
Apr 2025 410 53 1 0 DL,OO,AS
Mar 2025 423 55 0 0 AS,OO,DL
Feb 2025 378 108 3 0 AS,OO,DL
Jan 2025 396 87 0 1 AS,OO,DL
Dec 2024 437 86 1 2 AS,DL,OO
Nov 2024 478 58 2 0 OO,AS,DL
Oct 2024 449 48 0 0 AS,OO,DL
Sep 2024 454 94 1 0 OO,AS,DL
Aug 2024 452 71 0 0 AS,DL,OO
Jul 2024 433 68 6 0 AS,DL,OO
Jun 2024 404 63 1 0 AS,DL,OO
May 2024 430 52 0 0 AS,DL,OO
Apr 2024 437 38 2 0 AS,DL,OO
Mar 2024 433 52 1 0 AS,DL,OO
Feb 2024 385 37 1 0 AS,DL,OO
Jan 2024 395 101 21 0 AS,DL,OO

GEG–SEA seasonal on-time pattern

Best: March (90.8%) · weakest: December (75.3%)

70%75%80%85%90%95% JanFebMarAprMayJunJulAugSepOctNovDec 75.3%

Strongest calendar month

March

90.8% on-time · ~419 flights/mo

Busiest calendar month

September

~506 flights/mo avg

Weakest calendar month

December

75.3% on-time · ~414 flights/mo

Cancellation Rate

0.7%

70 of 10,470 flights

Diversion Rate

0.1%

7 of 10,470 flights

Explore origin & destination

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

GEG - Spokane

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

GEG on-time profile

SEA - Seattle

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

SEA on-time profile

Compare the two airports

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

Compare GEG vs SEA

Origin-hub reliability standing

Among GEG's stronger departures

GEG → SEA posts a 86.5% on-time rate, landing in the ≥85% band with 12 of 18 BTS-tracked routes leaving Spokane. The same hub also shows 6 mid-band and 0 challenged departures · fleet-wide on-time rank #764 of 4927 (highest on-time = #1).

What the Data Says About GEG to SEA

Spokane to Seattle (GEG to SEA) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 86.5% on-time rate across 31,745 flights, with delays that do happen averaging 65.3 minutes. The corridor runs roughly 224 miles and is served by 20 carriers. Over the most recent 24 months, 70 of 10,470 flights were cancelled (0.7%) and 7 diverted (0.1%).

The monthly split is wide on this route: Apr 2024 posted the strongest performance at 91% on-time, while Feb 2025 came in at just 71% - a 20-point swing worth factoring into travel timing.

On the multi-year calendar, GEG–SEA peaks in March at 90.8% on-time while September carries the heaviest traffic (~506 flights per month) ; the softest month is December at 75.3%, a 15.5-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does GEG to SEA rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, GEG to SEA ranks #104 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 GEG to SEA? ▼
Flights from Spokane to Seattle have a 86.5% on-time rate based on 31,745 flights. The average delay is 65.3 minutes. The best recent month was Apr 2024 with 91% on-time.
What is the cancellation rate for GEG to SEA? ▼
Over the last 24 months, 0.7% of flights on this route were cancelled (70 of 10,470 flights) and 0.1% were diverted.
How far is the flight from GEG to SEA? ▼
The flight distance from Spokane (GEG) to Seattle (SEA) is approximately 224 miles. This route is served by 20 carriers.
When is the best time to fly from GEG to SEA? ▼
The best recent month for on-time performance was Apr 2024 (91% on-time). The worst was Feb 2025 (71% on-time). Consider booking during months with historically better performance.

Airports on this route

GEG Airport

Spokane
SEA Airport

Seattle
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 GEG–SEA data

GEG–SEA runs 7.5 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.

  • Compare GEG and SEA airport profiles: delay causes and top routes differ even on the same corridor. GEG airport
  • If your dates flex, March (90.8% on-time) beats December (75.3%) on this corridor. Seasonal chart
  • 4 other routes post a similar 86.5% 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.