United Airlines

UA1218Seattle to Denver

Name: United Airlines UA1218 Seattle to Denver: on-time record
Creator: TripStow
License: https://tripstow.com/notices

United Airlines flight UA1218 flies from Seattle Tacoma (SEA) to Denver (DEN), 1,645 km. Over August 2025 to July 2026 it usually arrives about 3 minutes early: 87% of 295 flights arrived within 15 minutes of schedule and 1.4% were cancelled (US Department of Transportation data).

On-time record, last 12 months

87%

on time (within 15 min)

11%

more than 30 min late

1.4%

cancelled

-3 min

average arrival vs schedule

Every operation of UA1218, August 2025 to July 2026: 295 flights. Source: US Bureau of Transportation Statistics, public domain.

Routes flown as UA1218

Seattle Tacoma (SEA) to Denver (DEN)185 flights
Los Angeles (LAX) to Baltimore (BWI)37 flights
Denver (DEN) to Philadelphia (PHL)28 flights
Montrose CO (MTJ) to Denver (DEN)19 flights
West Palm Beach (PBI) to Denver (DEN)16 flights
Nashville (BNA) to Houston (IAH)4 flights
Denver (DEN) to Palm Springs (PSP)3 flights
Denver (DEN) to Ontario (ONT)2 flights
Rochester (ROC) to Washington Dulles (IAD)1 flights

Other flights from Seattle to Denver

UA1049 UA1263 UA1351 UA1374 UA1417 UA1479 UA1505 UA1715 UA1747 UA1795 UA1835 AS1163

More about Seattle Tacoma (SEA) and Denver (DEN).

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