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Route · SEA → PUW · 2020–2025 BTS data

Seattle to Pullman

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SEA to PUW (Seattle to Pullman) ranks #3828 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

88%
On-time
+9 pts
vs US avg
55 min
Delay when late
1,990
Flights
#3828 of 4927
Corpus placement

Cancelled

2.1%

Best Month

Oct 2021 97%

Worst Month

Dec 2022 74%

Distance

250 mi

Carriers

1

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2022 85 22 13 1 QX
Nov 2022 100 13 1 0 QX
Oct 2022 124 11 0 0 QX
Sep 2022 138 20 0 0 QX
Aug 2022 93 9 1 0 QX
Jul 2022 93 6 0 0 QX
Jun 2022 88 15 0 0 QX
May 2022 91 6 2 0 QX
Apr 2022 72 6 4 0 QX
Mar 2022 62 6 0 0 QX
Feb 2022 84 6 1 0 QX
Jan 2022 91 19 3 2 QX
Dec 2021 62 15 5 1 QX
Nov 2021 59 6 1 0 QX
Oct 2021 68 2 0 0 QX
Sep 2021 90 5 0 0 QX
Aug 2021 93 18 2 1 QX
Jul 2021 93 19 0 0 QX
Jun 2021 90 13 1 1 QX
May 2021 74 4 0 0 QX
Apr 2021 60 5 0 0 QX
Mar 2021 62 4 0 0 QX
Feb 2021 56 7 7 0 QX
Jan 2021 62 2 1 0 QX

SEA–PUW seasonal on-time pattern

Best: May (93.9%) · weakest: December (74.8%)

70%75%80%85%90%95% JanFebMarAprMayJunJulAugSepOctNovDec 74.8%

Strongest calendar month

May

93.9% on-time · ~83 flights/mo

Busiest calendar month

September

~114 flights/mo avg

Weakest calendar month

December

74.8% on-time · ~74 flights/mo

Cancellation Rate

2.1%

42 of 1,990 flights

Diversion Rate

0.3%

6 of 1,990 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

PUW - Pullman

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

PUW on-time profile

Compare the two airports

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

Compare SEA vs PUW

Origin-hub reliability standing

Among SEA's stronger departures

SEA → PUW posts a 88% on-time rate, landing in the ≥85% band with 25 of 89 BTS-tracked routes leaving Seattle. The same hub also shows 63 mid-band and 1 challenged departures · fleet-wide on-time rank #421 of 4927 (highest on-time = #1).

What the Data Says About SEA to PUW

Seattle to Pullman (SEA to PUW) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 88% on-time rate across 1,990 flights, with delays that do happen averaging 55.0 minutes. The corridor runs roughly 250 miles and is served by 1 carrier. Over the most recent 24 months, 42 of 1,990 flights were cancelled (2.1%) and 6 diverted (0.3%).

The monthly split is wide on this route: Oct 2021 posted the strongest performance at 97% on-time, while Dec 2022 came in at just 74% - a 23-point swing worth factoring into travel timing.

On the multi-year calendar, SEA–PUW peaks in May at 93.9% on-time while September carries the heaviest traffic (~114 flights per month) ; the softest month is December at 74.8%, a 19.1-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SEA to PUW rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SEA to PUW ranks #3828 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 PUW? ▼
Flights from Seattle to Pullman have a 88% on-time rate based on 1,990 flights. The average delay is 55.0 minutes. The best recent month was Oct 2021 with 97% on-time.
What is the cancellation rate for SEA to PUW? ▼
Over the last 24 months, 2.1% of flights on this route were cancelled (42 of 1,990 flights) and 0.3% were diverted.
How far is the flight from SEA to PUW? ▼
The flight distance from Seattle (SEA) to Pullman (PUW) is approximately 250 miles. This route is served by 1 carrier.
When is the best time to fly from SEA to PUW? ▼
The best recent month for on-time performance was Oct 2021 (97% on-time). The worst was Dec 2022 (74% on-time). Consider booking during months with historically better performance.

Airports on this route

SEA Airport

Seattle
PUW Airport

Pullman
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–PUW data

SEA–PUW runs 9 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 PUW airport profiles: delay causes and top routes differ even on the same corridor. SEA airport
  • If your dates flex, May (93.9% on-time) beats December (74.8%) on this corridor. Seasonal chart
  • 4 other routes post a similar 88% 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.