Route · PUW → SEA · 2020–2025 BTS data
Pullman to Seattle
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), PUW to SEA (Pullman to Seattle) ranks #3827 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 84.9%
- On-time
- +5.9 pts
- vs US avg
- 63 min
- Delay when late
- 1,990
- Flights
- #3827 of 4927
- Corpus placement
Cancelled
2.3%
Best Month
May 2021 97%
Worst Month
Dec 2022 55%
Distance
250 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2022 | 85 | 38 | 14 | 0 | QX |
| Nov 2022 | 100 | 34 | 1 | 0 | QX |
| Oct 2022 | 125 | 16 | 0 | 1 | QX |
| Sep 2022 | 137 | 14 | 0 | 0 | QX |
| Aug 2022 | 93 | 9 | 1 | 0 | QX |
| Jul 2022 | 93 | 5 | 0 | 0 | QX |
| Jun 2022 | 88 | 9 | 0 | 0 | QX |
| May 2022 | 91 | 7 | 4 | 0 | QX |
| Apr 2022 | 72 | 7 | 1 | 0 | QX |
| Mar 2022 | 62 | 5 | 0 | 0 | QX |
| Feb 2022 | 84 | 15 | 1 | 0 | QX |
| Jan 2022 | 91 | 19 | 4 | 1 | QX |
| Dec 2021 | 62 | 21 | 3 | 0 | QX |
| Nov 2021 | 59 | 8 | 1 | 0 | QX |
| Oct 2021 | 68 | 5 | 0 | 0 | QX |
| Sep 2021 | 90 | 12 | 0 | 0 | QX |
| Aug 2021 | 93 | 15 | 2 | 0 | QX |
| Jul 2021 | 93 | 16 | 0 | 0 | QX |
| Jun 2021 | 90 | 13 | 2 | 0 | QX |
| May 2021 | 74 | 2 | 0 | 0 | QX |
| Apr 2021 | 60 | 3 | 0 | 0 | QX |
| Mar 2021 | 62 | 8 | 2 | 0 | QX |
| Feb 2021 | 56 | 15 | 9 | 0 | QX |
| Jan 2021 | 62 | 4 | 1 | 0 | QX |
PUW–SEA seasonal on-time pattern
Best: May (94.5%) · weakest: December (59.9%)
Strongest calendar month
May
94.5% on-time · ~83 flights/mo
Busiest calendar month
September
~114 flights/mo avg
Weakest calendar month
December
59.9% on-time · ~74 flights/mo
Cancellation Rate
2.3%
46 of 1,990 flights
Diversion Rate
0.1%
2 of 1,990 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
PUW - Pullman
Full on-time, delay-cause, and seasonal performance for Pullman, WA.
PUW on-time profileSEA - Seattle
Full on-time, delay-cause, and seasonal performance for Seattle, WA.
SEA on-time profileCompare the two airports
See PUW and SEA side by side on delays, cancellations, and reliability.
Compare PUW vs SEASimilar routes
Other BTS-tracked routes with comparable performance or trip length to PUW–SEA.
Routes with a similar on-time rate
What the Data Says About PUW to SEA
Bureau of Transportation Statistics records show Pullman to Seattle (PUW to SEA) running a 84.9% on-time rate over 1,990 tracked flights, on the stronger end of a typical domestic pairing. When flights do run late, the average delay is 63.2 minutes. The 250-mile corridor is served by 1 carrier, and over the last 24 months 2.3% of 1,990 flights were cancelled, 0.1% diverted.
The monthly split is wide on this route: May 2021 posted the strongest performance at 97% on-time, while Dec 2022 came in at just 55% - a 42-point swing worth factoring into travel timing.
On the multi-year calendar, PUW–SEA peaks in May at 94.5% on-time while September carries the heaviest traffic (~114 flights per month) ; the softest month is December at 59.9%, a 34.6-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does PUW to SEA rank among US routes by traffic? ▼
How often are flights delayed from PUW to SEA? ▼
What is the cancellation rate for PUW to SEA? ▼
How far is the flight from PUW to SEA? ▼
When is the best time to fly from PUW to SEA? ▼
Airports on this route
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 PUW–SEA data
PUW–SEA runs 5.9 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare PUW and SEA airport profiles: delay causes and top routes differ even on the same corridor. PUW airport
- If your dates flex, May (94.5% on-time) beats December (59.9%) on this corridor. Seasonal chart
- 4 other routes post a similar 84.9% 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.
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.