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Route · SEA → EUG · 2020–2025 BTS data

Seattle to Eugene

According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), SEA to EUG (Seattle to Eugene) ranks #937 of 4927 tracked domestic routes by total flights (most flights = #1).

Data updated 2026-06-13

86.4%
On-time
+7.4 pts
vs US avg
58 min
Delay when late
11,739
Flights
#937 of 4927
Corpus placement

Cancelled

1.1%

Best Month

Nov 2025 90%

Worst Month

Jun 2025 71%

Distance

234 mi

Carriers

5

Monthly Performance

Recent 24 months of route data.

Period Flights Delayed Cancelled Diverted Carriers
Dec 2025 149 30 1 0 AS,OO
Nov 2025 136 13 9 0 OO,AS
Oct 2025 164 17 1 0 AS,OO
Sep 2025 210 30 0 0 OO,AS
Aug 2025 196 40 0 0 OO,AS
Jul 2025 184 44 1 0 AS,OO
Jun 2025 191 55 0 0 AS,OO
May 2025 176 36 0 0 AS,OO
Apr 2025 158 26 0 0 OO,AS
Mar 2025 182 41 0 0 AS,OO
Feb 2025 139 30 4 1 AS,OO
Jan 2025 115 16 1 0 AS,OO
Dec 2024 109 25 0 0 AS,OO
Nov 2024 108 11 0 0 OO,AS
Oct 2024 115 12 0 0 AS,OO
Sep 2024 110 15 0 0 OO,AS
Aug 2024 112 16 0 0 AS,OO
Jul 2024 114 26 0 0 AS,OO
Jun 2024 120 25 0 0 AS,OO
May 2024 115 13 1 0 AS,OO
Apr 2024 109 16 0 0 OO
Mar 2024 116 15 0 0 AS,OO
Feb 2024 110 14 1 0 AS,OO
Jan 2024 112 24 17 0 AS,OO

SEA–EUG seasonal on-time pattern

Best: October (91.3%) · weakest: December (76.8%)

75%80%85%90%95% JanFebMarAprMayJunJulAugSepOctNovDec 76.8%

Strongest calendar month

October

91.3% on-time · ~165 flights/mo

Busiest calendar month

August

~186 flights/mo avg

Weakest calendar month

December

76.8% on-time · ~143 flights/mo

Cancellation Rate

1.1%

36 of 3,350 flights

Diversion Rate

0.0%

1 of 3,350 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

EUG - Eugene

Full on-time, delay-cause, and seasonal performance for Eugene, OR.

EUG on-time profile

Compare the two airports

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

Compare SEA vs EUG

Origin-hub reliability standing

Among SEA's stronger departures

SEA → EUG posts a 86.4% 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 #803 of 4927 (highest on-time = #1).

What the Data Says About SEA to EUG

Seattle to Eugene (SEA to EUG) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 86.4% on-time rate across 11,739 flights, with delays that do happen averaging 58.0 minutes. The corridor runs roughly 234 miles and is served by 5 carriers. Over the most recent 24 months, 36 of 3,350 flights were cancelled (1.1%) and 1 diverted (0.0%).

The monthly split is wide on this route: Nov 2025 posted the strongest performance at 90% on-time, while Jun 2025 came in at just 71% - a 19-point swing worth factoring into travel timing.

On the multi-year calendar, SEA–EUG peaks in October at 91.3% on-time while August carries the heaviest traffic (~186 flights per month) ; the softest month is December at 76.8%, a 14.5-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.

Frequently Asked Questions

Where does SEA to EUG rank among US routes by traffic? ▼
According to PlainFlights' route traffic ranking, SEA to EUG ranks #937 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 EUG? ▼
Flights from Seattle to Eugene have a 86.4% on-time rate based on 11,739 flights. The average delay is 58.0 minutes. The best recent month was Nov 2025 with 90% on-time.
What is the cancellation rate for SEA to EUG? ▼
Over the last 24 months, 1.1% of flights on this route were cancelled (36 of 3,350 flights) and 0.0% were diverted.
How far is the flight from SEA to EUG? ▼
The flight distance from Seattle (SEA) to Eugene (EUG) is approximately 234 miles. This route is served by 5 carriers.
When is the best time to fly from SEA to EUG? ▼
The best recent month for on-time performance was Nov 2025 (90% on-time). The worst was Jun 2025 (71% on-time). Consider booking during months with historically better performance.

Airports on this route

SEA Airport

Seattle
EUG Airport

Eugene
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–EUG data

SEA–EUG runs 7.4 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 EUG airport profiles: delay causes and top routes differ even on the same corridor. SEA airport
  • If your dates flex, October (91.3% on-time) beats December (76.8%) on this corridor. Seasonal chart
  • 4 other routes post a similar 86.4% 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.