AS1538: St. Louis to Portland
Alaska Airlines flight AS1538 flies from St. Louis (STL) to Portland (PDX), 2,742 km. Over May 2026 to July 2026 it usually arrives about 4 minutes early: 86% of 53 flights arrived within 15 minutes of schedule and 3.8% were cancelled (US Department of Transportation data).
On-time record, last 12 months
Every operation of AS1538, May 2026 to July 2026: 53 flights. Source: US Bureau of Transportation Statistics, public domain.
Routes flown as AS1538
Other flights from St. Louis to Portland
More about St. Louis (STL) and Portland (PDX).
Questions and answers
- Is AS1538 usually on time?
- 86% of Alaska Airlines flight AS1538's 53 flights from May 2026 to July 2026 arrived within 15 minutes of schedule. It arrived about 4 minutes early on average.
- How often is AS1538 cancelled or badly delayed?
- 3.8% of AS1538's scheduled flights were cancelled from May 2026 to July 2026 (2 of 53), and 4% of the flights that operated arrived more than 30 minutes late.
- What route does AS1538 fly?
- AS1538 most often flies from St. Louis (STL) to Portland (PDX), 2,742 km (52 flights in the period). The same flight number also flew Salt Lake City (SLC) to Seattle Tacoma (SEA).
- Where do these AS1538 figures come from?
- From the US Bureau of Transportation Statistics (BTS) on-time records, which cover every domestic flight by the larger US airlines. The figures cover May 2026 to July 2026 and are updated each month when new BTS data is published, about two months after the month ends. See how TripStow measures punctuality.
How does Alaska Airlines compare? Alaska Airlines' on-time record and the US airline league table.
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