Southwest Airlines operates flight WN1421 on 4 airport pairs: Phoenix (PHX) to Los Angeles (LAX), Atlanta (ATL) to Phoenix (PHX), Portland (PDX) to San Jose (SJC), and San Jose (SJC) to Las Vegas (LAS). Our Starlink rating for this flight is very unlikely on all 4 airport pairs. For PHX to LAX: Based on how many 737-800 aircraft at Southwest Airlines have Starlink. On the most recent figures we hold, Starlink is on 21 of Southwest Airlines' 817 aircraft.
For PHX to LAX: Based on how many 737-800 aircraft at Southwest Airlines have Starlink.
Equipped
Fleet Size
Coverage
Southwest Airlines last published 13; 21 aircraft independently verified.
For PHX to LAX: Based on how many 737-800 aircraft at Southwest Airlines have Starlink.
Very unlikely means the evidence points to an aircraft without Starlink today. That can change as the airline equips more aircraft.
Flight WN1421 flies 4 airport pairs, and the rating is the same on every one.
Typical aircraft: 737-800
Typical aircraft: 737 (other variants)
Typical aircraft: 737 (other variants)
Typical aircraft: 737 MAX 8
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Rating: Very unlikely. This is our rating that this specific flight has Starlink. For PHX to LAX: Based on how many 737-800 aircraft at Southwest Airlines have Starlink.
Aircraft that operated WN1421 in the last 90 days, from our weekly flight tracking.
| Aircraft | Type | Last week seen | Starlink |
|---|---|---|---|
| N8749Q | 737 MAX 8 | Oct 5, 2026 | Not confirmed |
| N215WN | 737 (other variants) | Sep 28, 2026 | Not confirmed |
| N8728Q | 737 MAX 8 | Sep 28, 2026 | Not confirmed |
| N8730Q | 737 MAX 8 | Sep 28, 2026 | Not confirmed |
| N8751R | 737 MAX 8 | Sep 28, 2026 | Not confirmed |
| N8806Q | 737 MAX 8 | Sep 28, 2026 | Not confirmed |
| N8943Q | 737 MAX 8 | Sep 28, 2026 | Not confirmed |
Check the Starlink rating on other Southwest Airlines routes.
Our Starlink rating for flight WN1421 is very unlikely on all 4 airport pairs. For PHX to LAX: Based on how many 737-800 aircraft at Southwest Airlines have Starlink. Southwest Airlines is actively rolling out Starlink across its fleet. Check back as our data updates.
Southwest Airlines uses Starlink satellite WiFi on equipped aircraft. We rate flight WN1421 very unlikely on all 4 airport pairs.
The most reliable method is to check your specific aircraft. Flight-tracking sites and some airline apps show the aircraft registration close to departure. You can search that registration on StarlinkFlights.com. Our rating for flight WN1421 is very unlikely on all 4 airport pairs. The explanation is on this page.
The rating is a label, not a guarantee. It reflects the evidence we hold for the route. For PHX to LAX: Based on how many 737-800 aircraft at Southwest Airlines have Starlink. Passenger speed tests and aircraft records for this specific flight are listed on this page as evidence. They do not change the rating.
No rating can guarantee a specific aircraft. Airlines swap aircraft for maintenance, operations or schedule changes, so an equipped aircraft can be replaced by one without Starlink on the day. A high rating means the evidence favors Starlink, but it is not a guarantee. On the day of departure, check the airline's gate display or app.
