| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Jun 10 | STL | SEA | 18:58 | 20:53 |
Landed
|
Track > |
| Jun 09 | STL | SEA | 18:52 | 20:33 |
Landed
|
Track > |
| Jun 08 | STL | SEA | 19:03 | 21:03 |
Landed Late
|
Track > |
| Jun 07 | STL | SEA | 18:29 | 20:41 |
Landed
|
Track > |
| Jun 06 | STL | SEA | 18:28 | 20:24 |
Landed
|
Track > |
| Jun 05 | STL | SEA | 18:49 | 20:40 |
Landed
|
Track > |
| Jun 04 | STL | SEA | 19:02 | 21:00 |
Landed Late
|
Track > |
| Jun 03 | STL | SEA | 18:37 | 20:48 |
Landed
|
Track > |
| Jun 02 | STL | SEA | 23:58 | 02:04 |
Delayed >3h
|
Track > |
| Claim > | ||||||
| Jun 01 | STL | SEA | 19:01 | 20:58 |
Landed
|
Track > |
Alaska Airlines Flight AS503 connects St. Louis, United States to Seattle, United States, taking off from St. Louis Lambert International Airport STL and landing at Seattle Tacoma International Airport SEA.
How long is the AS503 flight from St. Louis to Seattle?
The average flight time from St. Louis to Seattle is 3 hours and 58 minutes. The flight distance is 2744 km / 1705 miles and the average flight speed is 691 km/h / 429 mph.
What is the On-Time Performance (OTP) of Alaska Airlines Flight AS503 St. Louis to Seattle?
The Airportia On-Time Performance Rating for Alaska Airlines Flight AS503 is 4.4/5 stars. This metric is calculated using data from the past 10 flights.
When was the latest AS503 flight?
The latest flight took off on Wednesday, June 11th, 2025 with the flight status being Landed on 20:53.
How else can the flight AS503 be referenced as?
This Alaska Airlines flight can also be referenced as ASA503, AS0503, AS 503, ASA 503.
How often is flight AS503 delayed?
On average, 60% of all AS503 flights are delayed. The average delay is 62 minutes.
Can I get compensation for my delayed or cancelled AS503 flight or baggage issues?
If your AS503 flight was cancelled, delayed, or if you experienced baggage issues such as delayed, damaged, or lost bags, you may be entitled to compensation. Compensation amounts and eligibility depend on various regulations, including EC 261/2004, UK261, CA Montreal Convention, US GoodWill, BR-ANAC, SA-GACA and TK-SHY.
See our AS503 Flight Tracker above for more details.
Flight AS503 is code-shared by 3 airlines using the flight numbers AA7514, HA7125, TN2676
Other flights departing from St. Louis STL: AS315, WN6385, AS504, WN6305
Other flights arriving at Seattle SEA: AS477, AS3253, AS3406, AS2330
All flights connecting St. Louis STL to Seattle SEA.
