Route · ANC → SEA · 2020–2025 BTS data
Anchorage to Seattle
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), ANC to SEA (Anchorage to Seattle) ranks #34 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 85.8%
- On-time
- +6.8 pts
- vs US avg
- 61 min
- Delay when late
- 41,064
- Flights
- #34 of 4927
- Corpus placement
Cancelled
1.1%
Best Month
May 2024 91%
Worst Month
Jul 2024 76%
Distance
1,448 mi
Carriers
10
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Dec 2025 | 475 | 99 | 5 | 0 | DL,AS |
| Nov 2025 | 485 | 64 | 7 | 0 | DL,AS |
| Oct 2025 | 555 | 62 | 7 | 2 | AS,DL |
| Sep 2025 | 625 | 83 | 2 | 0 | DL,AS,HA |
| Aug 2025 | 726 | 165 | 7 | 0 | HA,AS,DL |
| Jul 2025 | 746 | 158 | 20 | 0 | AS,DL,HA |
| Jun 2025 | 698 | 121 | 3 | 0 | AS,DL,HA |
| May 2025 | 663 | 70 | 5 | 2 | AS,DL |
| Apr 2025 | 492 | 71 | 1 | 0 | DL,AS |
| Mar 2025 | 477 | 65 | 0 | 0 | AS,DL |
| Feb 2025 | 438 | 50 | 5 | 0 | AS,DL |
| Jan 2025 | 497 | 70 | 5 | 0 | AS,DL |
| Dec 2024 | 511 | 80 | 0 | 1 | AS,DL |
| Nov 2024 | 518 | 63 | 1 | 1 | AS,DL |
| Oct 2024 | 586 | 78 | 3 | 0 | AS,DL |
| Sep 2024 | 662 | 94 | 2 | 0 | AS,DL |
| Aug 2024 | 846 | 108 | 8 | 4 | AS,DL |
| Jul 2024 | 869 | 209 | 15 | 1 | AS,DL |
| Jun 2024 | 794 | 100 | 6 | 0 | AS,DL |
| May 2024 | 701 | 66 | 4 | 0 | AS,DL |
| Apr 2024 | 570 | 77 | 2 | 0 | AS,DL |
| Mar 2024 | 535 | 103 | 6 | 0 | AS,DL |
| Feb 2024 | 480 | 62 | 0 | 1 | AS,DL |
| Jan 2024 | 515 | 113 | 41 | 0 | AS,DL |
ANC–SEA seasonal on-time pattern
Best: May (91.4%) · weakest: December (79.5%)
Strongest calendar month
May
91.4% on-time · ~566 flights/mo
Busiest calendar month
August
~744 flights/mo avg
Weakest calendar month
December
79.5% on-time · ~499 flights/mo
Cancellation Rate
1.1%
155 of 14,464 flights
Diversion Rate
0.1%
12 of 14,464 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
ANC - Anchorage
Full on-time, delay-cause, and seasonal performance for Anchorage, AK.
ANC on-time profileSEA - Seattle
Full on-time, delay-cause, and seasonal performance for Seattle, WA.
SEA on-time profileCompare the two airports
See ANC and SEA side by side on delays, cancellations, and reliability.
Compare ANC vs SEAOrigin-hub reliability standing
Among ANC's stronger departures
ANC → SEA posts a 85.8% on-time rate, landing in the ≥85% band with 10 of 21 BTS-tracked routes leaving Anchorage. The same hub also shows 10 mid-band and 1 challenged departures · fleet-wide on-time rank #945 of 4927 (highest on-time = #1).
Similar routes
Other BTS-tracked routes with comparable performance or trip length to ANC–SEA.
Routes with a similar on-time rate
What the Data Says About ANC to SEA
Anchorage to Seattle (ANC to SEA) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 85.8% on-time rate across 41,064 flights, with delays that do happen averaging 61.1 minutes. The corridor runs roughly 1,448 miles and is served by 10 carriers. Over the most recent 24 months, 155 of 14,464 flights were cancelled (1.1%) and 12 diverted (0.1%).
Monthly performance varies moderately here: May 2024 was the strongest month at 91% on-time versus Jul 2024 at 76%, a 15-point difference.
On the multi-year calendar, ANC–SEA peaks in May at 91.4% on-time while August carries the heaviest traffic (~744 flights per month) ; the softest month is December at 79.5%, a 11.9-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does ANC to SEA rank among US routes by traffic? ▼
How often are flights delayed from ANC to SEA? ▼
What is the cancellation rate for ANC to SEA? ▼
How far is the flight from ANC to SEA? ▼
When is the best time to fly from ANC 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 ANC–SEA data
ANC–SEA runs 6.8 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare ANC and SEA airport profiles: delay causes and top routes differ even on the same corridor. ANC airport
- If your dates flex, May (91.4% on-time) beats December (79.5%) on this corridor. Seasonal chart
- 4 other routes post a similar 85.8% 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.