Thai Lion Air SL521 Flight Status
According to Trip.com latest record on status for Thai Lion Air flight SL521 from Chiang Mai to Bangkok (CNX-DMK): Flights for Oct 22, 2026 are scheduled, with the next departure slated for 21:30 from CNX and an expected arrival at 22:24 at DMK .
Wed, Oct 21
Thu, Oct 22
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Cancelled
Contact your airline for the latest information.
1h 15m
Check-in Counter
39-41
Boarding Gate
--
Arrival Gate
--
Baggage
--
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Scheduled
Your flight will depart on time.
1h 15m
Check-in Counter
39-41
Boarding Gate
5
Arrival Gate
--
Baggage
--
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SL521 Aircraft Specifications
According to Trip.com real-time data, the SL521 flight from Chiang Mai to Bangkok on 10/22/2026 is operated using the aircraft model Boeing 737-800. This aircraft has been in service for 8y, 4m. The aircraft has 215 seats.
Boeing 737-800
On-Time Departure
97
%
On-Time Arrival
97
%
Avg. Early
10 minutes
Aircraft Age
8y, 4m
Total Seats
215
Flight Distance
--
Economy
Cabin Amenities
None
In-flight entertainment is unavailable
Wi-Fi is unavailable
No power outlets are available
Seat Information
74 cm
More legroom than on 65% of flights
43 cm
Seat width better than on 65% of flights
90°
Reclining Angle
3-3
Seat layout example
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SL521 Flight History
Check more records from Trip.com about SL521 before and after today
| Date | Airport | Aircraft Model | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Departure | Arrival | |||||
| Wed, Oct 14 | Chiang Mai (CNX) | Bangkok (DMK) | 739 | 21:26 | 22:21 | Arrived |
| Fri, Oct 16 | Chiang Mai (CNX) | Bangkok (DMK) | 739 | 21:33 | 22:26 | Arrived |
| Sat, Oct 17 | Chiang Mai (CNX) | Bangkok (DMK) | 739 | 21:41 | 22:35 | Arrived |
| Sun, Oct 18 | Chiang Mai (CNX) | Bangkok (DMK) | 739 | 21:51 | 22:47 | Arrived |
| Tue, Oct 20 | Chiang Mai (CNX) | Bangkok (DMK) | 738 | 21:30 | 22:24 | Delayed |
| Wed, Oct 21 | Chiang Mai (CNX) | Bangkok (DMK) | 738 | -- | -- | Cancelled |
| Thu, Oct 22 | Chiang Mai (CNX) | Bangkok (DMK) | 738 | 21:30 | 22:24 | Scheduled |
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SL521 On-Time Performance
Based on the average performance of this flight over the last 30 trips, the on-time departure rate of SL521 is 97% (Late on average 9 minutes), and the on-time arrival rate is 97% (Early on average 10 minutes).
On-Time Departures
Punctuality
97
%
Late on average
9 minutes
Early
17
%
On time
80
%
30 mins late
0
%
60 mins late
0
%
90 mins late
3
%
Cancelled
2
%
On-Time Arrivals
Punctuality
97
%
Early on average
10 minutes
Early
90
%
On time
7
%
30 mins late
0
%
60 mins late
0
%
90 mins late
3
%
Cancelled
2
%
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Flight FAQs
What is the current status of flight sl521?
Flight sl521 has not departed yet and is currently on schedule. Scheduled departure 21:30, arrival 22:45 (updated Oct 22, 2026).Is flight sl521 on time today?
Flight sl521 has not departed yet and is currently on schedule. Scheduled departure is 21:30, with arrival at 22:45. Recheck gate and timing before you head to the airport.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 21:30, and the current status is Scheduled (updated Oct 22, 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 22:24. Status is Scheduled as of Oct 22, 2026.What is the gate information for flight sl521?
For flight sl521, the departure terminal is D and the boarding gate is 5. Gate assignments can change at short notice—confirm on airport screens before heading to security.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 (Scheduled, updated Oct 22, 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 not departed from Chiang Mai (CNX) yet and is currently on schedule for 21:30.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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