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C

Seattle (SEA) departure delays

15,402 departures · 82 routes · February 2025 – July 2026

74.35%

Left on time

Within 15 minutes of schedule

0.48%

Cancelled

Share of departures

48 min

When late, late by

Average delayed departure

#58

Rank

Among graded US airports

What the record says about SEA

Departures from Seattle run late more often than average — enough that a tight connection at the far end deserves a second look.

The airlines flying from here are not equally affected. Virgin Atlantic left on time 30.5 points more often than Southwest Airlines from the same airport — which is the clearest evidence available that a delayed departure is not purely the airport's fault.

With 40 routes in the record, SEA is a hub, and hubs carry a particular risk: a delay early in the day propagates through every aircraft that was due to fly on afterwards. Morning departures from a hub are reliably better than evening ones.

Which airlines run best out of SEA

Airline	Departures	On time
Virgin Atlantic	463	89.3%
SkyWest Airlines	2,519	84.6%
Delta Air Lines	2,886	81.7%
Alaska Airlines	7,142	78.2%
American Airlines	707	73.3%
United Airlines	915	73.2%
British Airways	937	70.6%
Southwest Airlines	919	58.8%

Routes out of SEA

SEA → LHR London 1,330 flights · 76.98% on time C SEA → ANC Anchorage 665 flights · 75.98% on time C SEA → LAX Los Angeles 651 flights · 85.03% on time A SEA → DEN Denver 635 flights · 72.2% on time C SEA → SFO San Francisco 633 flights · 39.17% on time F SEA → ORD Chicago 582 flights · 72.49% on time D SEA → PHX Phoenix 569 flights · 77.46% on time B SEA → DFW Dallas/Fort Worth 491 flights · 69.98% on time D SEA → LAS Las Vegas 476 flights · 80.04% on time B SEA → SAN San Diego 436 flights · 73.21% on time C SEA → SMF Sacramento 408 flights · 83.82% on time A SEA → PDX Portland 403 flights · 81.89% on time B SEA → SJC San Jose 402 flights · 76.31% on time C SEA → GEG Spokane 375 flights · 83.11% on time B SEA → SLC Salt Lake City 359 flights · 83.84% on time A SEA → SNA Santa Ana 354 flights · 83.62% on time A SEA → ATL Atlanta 325 flights · 83.64% on time A SEA → BOI Boise 312 flights · 85.58% on time A SEA → BOS Boston 278 flights · 70.8% on time D SEA → JFK New York 270 flights · 78.11% on time C SEA → MSP Minneapolis 251 flights · 84% on time A SEA → ONT Ontario 240 flights · 85.59% on time B SEA → HNL Honolulu 237 flights · 68.64% on time D SEA → EWR Newark 225 flights · 83.33% on time B SEA → IAH Houston 217 flights · 85.12% on time A SEA → DTW Detroit 209 flights · 91.35% on time A SEA → AUS Austin 207 flights · 73.79% on time C SEA → FAI Fairbanks 200 flights · 80.5% on time B SEA → JNU Juneau 199 flights · 76.26% on time — SEA → IAD Washington 198 flights · 83.16% on time — SEA → OAK Oakland 186 flights · 69.89% on time — SEA → BNA Nashville 177 flights · 81.82% on time — SEA → PHL Philadelphia 173 flights · 86.9% on time — SEA → BUR Burbank 164 flights · 76.1% on time — SEA → EUG Eugene 156 flights · 85.26% on time — SEA → MCO Orlando 150 flights · 84.56% on time — SEA → OGG Kahului 150 flights · 89.33% on time — SEA → RDM Bend/Redmond 150 flights · 85.33% on time — SEA → BZN Bozeman 150 flights · 82% on time — SEA → CLT Charlotte 144 flights · 81.25% on time —