Thai Lion Air SL521 Flight status
According to Trip.com’s latest update for Thai Lion Air flight SL521 from Chiang Mai to Bangkok (CNX–DMK): Flight SL521 has safely landed at Don Mueang International Airport (DMK) at 22:19 (local time). Arrival was about 26m early.
Wed, Nov 11
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Arrived
The flight has arrived 26m early
1h 15m
Check-in Counter
39-41
Boarding Gate
4
Arrival Gate
--
Baggage
12
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SL521 Aircraft Details
According to Trip.com real-time data, the SL521 flight flying from Chiang Mai to Bangkok on 11/12/2026 is operated by the aircraft model Boeing 737-800. This aircraft has been in service for 11y, 11m. The aircraft is equipped with 189 seats.
Boeing 737-800
Punctuality (Departure)
100
%
Punctuality (Arrival)
100
%
Early on average
16 minutes
Age
11y, 11m
Seats
189
Flight Distance
--
Economy
In-Flight Services
None
In-flight entertainment is unavailable
Wi-Fi is unavailable
No power outlets are available
Seat Information
79 cm
More legroom than on 93% of flights
43 cm
Seat width better than on 66% of flights
90°
Reclining Angle
3-3
Seat layout example
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Flight History for SL521
Check more records from Trip.com about SL521 before and after today
| Date | Airport | Aircraft Model | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Departure | Arrival | |||||
| Thu, Nov 5 | Chiang Mai (CNX) | Bangkok (DMK) | 738 | 21:33 | 22:26 | Arrived |
| Fri, Nov 6 | Chiang Mai (CNX) | Bangkok (DMK) | 738 | 21:52 | 22:46 | Arrived |
| Sat, Nov 7 | Chiang Mai (CNX) | Bangkok (DMK) | 738 | 21:26 | 22:21 | Arrived |
| Sun, Nov 8 | Chiang Mai (CNX) | Bangkok (DMK) | 738 | 21:34 | 22:31 | Arrived |
| Mon, Nov 9 | Chiang Mai (CNX) | Bangkok (DMK) | 739 | 21:43 | 22:37 | Arrived |
| Tue, Nov 10 | Chiang Mai (CNX) | Bangkok (DMK) | 739 | 21:39 | 22:32 | Arrived |
| Wed, Nov 11 | Chiang Mai (CNX) | Bangkok (DMK) | 738 | 21:25 | 22:19 | Arrived |
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SL521 On-Time Performance
Based on the average performance of this flight over the past 30 trips, the on-time departure rate of SL521 is 100% (Late on average 3 minutes), and the on-time arrival rate is 100% (Early on average 16 minutes).
On-Time Departures
Punctuality
100
%
Late on average
3 minutes
Early
33
%
On time
67
%
30 mins late
0
%
60 mins late
0
%
90 mins late
0
%
Cancelled
4
%
On-Time Arrivals
Punctuality
100
%
Early on average
16 minutes
Early
90
%
On time
10
%
30 mins late
0
%
60 mins late
0
%
90 mins late
0
%
Cancelled
4
%
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Flight FAQs
What is the current status of flight sl521?
Flight sl521 has arrived (status: Arrived). Actual arrival 22:19 (updated Nov 12, 2026).Is flight sl521 on time today?
Flight sl521 has arrived (status: Arrived). Actual arrival was 22:19; follow airport screens for the baggage carousel.Has flight sl521 departed yet? What is the departure time?
Flight sl521 is scheduled to depart at 21:30. The latest actual or estimated departure time is 21:25, and the current status is Arrived (updated Nov 12, 2026).When is flight sl521 scheduled to arrive?
Flight sl521 is scheduled to arrive at 22:45. The latest estimated or actual arrival time is 22:19. Status is Arrived as of Nov 12, 2026.What is the gate information for flight sl521?
For flight sl521, the departure terminal is D and the boarding gate is 4. Gate assignments can change at short notice—confirm on airport screens before heading to security.What is the baggage carousel number for flight sl521?
After arrival, baggage for flight sl521 is expected at carousel 12 in terminal T2. Carousel numbers are assigned close to landing and may change—follow airport signs on arrival.What route does flight sl521 fly?
Flight sl521 is operated by Thai Lion Air from Chiang Mai (CNX) to Bangkok (DMK). Typical flight time is about 1 hour 15 minutes; operating days may include Thursday.How can I check real-time status for flight sl521?
Track flight sl521 on this Trip.com status page for live departure, arrival, gate and baggage updates. For push alerts on the go, open the same flight in the Trip.com App and turn on flight notifications.If flight sl521 is delayed or canceled, what should I do?
If sl521 is delayed or canceled, first confirm the latest status here (Arrived, updated Nov 12, 2026). Contact Thai Lion Air or your booking channel for rebooking or refund options, and check Trip.com Manage Booking if you booked on Trip.com.Has flight sl521 departed from Chiang Mai?
Flight sl521 has already left Chiang Mai and completed its journey. Departure was 21:25; actual arrival 22:19.What is the seat configuration for flight sl521?
Flight sl521 usually flies a Boeing 737-800 with seat layout 3-3. Layouts can differ by aircraft subtype and cabin product—confirm your seat map in Manage Booking after you purchase.
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