Route · LWS → SEA · 2020–2025 BTS data
Lewiston to Seattle
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), LWS to SEA (Lewiston to Seattle) ranks #4716 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 88.1%
- On-time
- +9.1 pts
- vs US avg
- 85 min
- Delay when late
- 734
- Flights
- #4716 of 4927
- Corpus placement
Cancelled
0.5%
Best Month
N/A
Worst Month
N/A
Distance
261 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 31 | 5 | 0 | 1 | OO |
| Nov 2025 | 30 | 5 | 0 | 0 | OO |
| Oct 2025 | 31 | 3 | 0 | 0 | OO |
| Sep 2025 | 30 | 2 | 0 | 0 | OO |
| Aug 2025 | 30 | 1 | 0 | 0 | OO |
| Jul 2025 | 31 | 0 | 0 | 0 | OO |
| Jun 2025 | 30 | 5 | 0 | 0 | OO |
| May 2025 | 31 | 2 | 0 | 0 | OO |
| Apr 2025 | 30 | 1 | 0 | 0 | OO |
| Mar 2025 | 31 | 2 | 0 | 1 | OO |
| Jan 2025 | 31 | 2 | 0 | 0 | OO |
| Dec 2024 | 31 | 5 | 0 | 0 | OO |
| Nov 2024 | 30 | 5 | 0 | 0 | OO |
| Oct 2024 | 31 | 2 | 0 | 0 | OO |
| Sep 2024 | 30 | 4 | 0 | 0 | OO |
| Aug 2024 | 31 | 3 | 0 | 0 | OO |
| Jul 2024 | 31 | 3 | 0 | 0 | OO |
| Jun 2024 | 30 | 0 | 0 | 0 | OO |
| May 2024 | 31 | 4 | 0 | 0 | OO |
| Apr 2024 | 30 | 3 | 0 | 0 | OO |
| Mar 2024 | 31 | 7 | 0 | 0 | OO |
| Jan 2024 | 31 | 9 | 2 | 0 | OO |
| Dec 2023 | 31 | 7 | 2 | 1 | OO |
| Nov 2023 | 30 | 7 | 0 | 0 | OO |
LWS–SEA seasonal on-time pattern
Best: July (95.2%) · weakest: November (81.1%)
Strongest calendar month
July
95.2% on-time · ~31 flights/mo
Busiest calendar month
January
~31 flights/mo avg
Weakest calendar month
November
81.1% on-time · ~30 flights/mo
Cancellation Rate
0.5%
4 of 734 flights
Diversion Rate
0.4%
3 of 734 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
LWS - Lewiston
Full on-time, delay-cause, and seasonal performance for Lewiston, ID.
LWS on-time profileSEA - Seattle
Full on-time, delay-cause, and seasonal performance for Seattle, WA.
SEA on-time profileCompare the two airports
See LWS and SEA side by side on delays, cancellations, and reliability.
Compare LWS vs SEAOrigin-hub reliability standing
Among LWS's stronger departures
LWS → SEA posts a 88.1% on-time rate, landing in the ≥85% band with 2 of 3 BTS-tracked routes leaving Lewiston. The same hub also shows 1 mid-band and 0 challenged departures · fleet-wide on-time rank #405 of 4927 (highest on-time = #1).
Similar routes
Other BTS-tracked routes with comparable performance or trip length to LWS–SEA.
Routes with a similar on-time rate
What the Data Says About LWS to SEA
Lewiston to Seattle (LWS to SEA) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 88.1% on-time rate across 734 flights, with delays that do happen averaging 85.1 minutes. The corridor runs roughly 261 miles and is served by 1 carrier. Over the most recent 24 months, 4 of 734 flights were cancelled (0.5%) and 3 diverted (0.4%).
Monthly performance data for this route did not show a clear best/worst split in the sample window; review the monthly table above for period-by-period detail.
On the multi-year calendar, LWS–SEA peaks in July at 95.2% on-time while January carries the heaviest traffic (~31 flights per month) ; the softest month is November at 81.1%, a 14.1-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does LWS to SEA rank among US routes by traffic? ▼
How often are flights delayed from LWS to SEA? ▼
What is the cancellation rate for LWS to SEA? ▼
How far is the flight from LWS 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 LWS–SEA data
LWS–SEA runs 9.1 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare LWS and SEA airport profiles: delay causes and top routes differ even on the same corridor. LWS airport
- If your dates flex, July (95.2% on-time) beats November (81.1%) on this corridor. Seasonal chart
- 4 other routes post a similar 88.1% 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.