Southwest Airlines flight WN 3821: Multiple routes

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Sun 06:10 Phoenix Sky Harbor (PHX) 4 11:25 Chicago Midway (MDW)
WN 3821 Non-stop Boeing 737 MAX 8 (7M8) 3:15 Effective 2026-04-12 through 2026-05-17
Sun 06:10 Phoenix Sky Harbor (PHX) 4 11:25 Chicago Midway (MDW)
WN 3821 Non-stop Boeing 737 MAX 8 (7M8) 3:15 Operates only on 2026-05-31
Mon-Fri 06:40 Phoenix Sky Harbor (PHX) 4 11:55 Chicago Midway (MDW)
WN 3821 Non-stop Boeing 737 MAX 8 (7M8) 3:15 Effective 2026-04-07 through 2026-06-03
Sun 06:55 Phoenix Sky Harbor (PHX) 4 12:10 Chicago Midway (MDW)
WN 3821 Non-stop Boeing 737 MAX 8 (7M8) 3:15 Operates only on 2026-05-24
Sat 07:00 Phoenix Sky Harbor (PHX) 4 12:15 Chicago Midway (MDW)
WN 3821 Non-stop Boeing 737-700 (Scimitar Winglets) 3:15 Effective 2026-04-11 through 2026-05-30
Sun 12:50 Cleveland (CLE) 14:25 Las Vegas Harry Reid (LAS) 1
WN 3821 Non-stop Boeing 737-800 (73H) 4:35 Effective 2026-03-08 through 2026-04-05
Mon,Thu,Fri 13:35 Cleveland (CLE) 15:15 Las Vegas Harry Reid (LAS) 1
WN 3821 Non-stop Boeing 737 MAX 8 (7M8) 4:40 Effective 2026-03-05 through 2026-04-06
Tue,Wed 15:35 Cleveland (CLE) 17:15 Las Vegas Harry Reid (LAS) 1
WN 3821 Non-stop Boeing 737-800 (73H) 4:40 Effective 2026-03-10 through 2026-04-01
Mon,Thu,Fri 15:55 Las Vegas Harry Reid (LAS) 1 17:25 Reno (RNO)
WN 3821 Non-stop Boeing 737 MAX 8 (7M8) 1:30 Effective 2026-03-05 through 2026-04-06
Sat 16:15 Cleveland (CLE) 17:55 Las Vegas Harry Reid (LAS) 1
WN 3821 Non-stop Boeing 737 MAX 8 (7M8) 4:40 Effective 2026-03-07 through 2026-04-04
Mon,Thu,Fri 20:10 Saint Louis (STL) 2 22:55 Raleigh/Durham (RDU) 1
WN 3821 Non-stop Boeing 737-700 (Scimitar Winglets) 1:45 Effective 2026-02-12 through 2026-02-16
Thu,Fri,Sun 20:10 Saint Louis (STL) 2 22:55 Raleigh/Durham (RDU) 1
WN 3821 Non-stop Boeing 737-700 (Scimitar Winglets) 1:45 Effective 2026-02-20 through 2026-03-01
Tue,Wed 20:45 Saint Louis (STL) 2 22:25 Dallas Love Field (DAL) 1
WN 3821 Non-stop Boeing 737 MAX 8 (7M8) 1:40 Effective 2026-08-04 through 2026-09-30
Mon,Thu,Fri,Sun 20:45 Saint Louis (STL) 2 22:25 Dallas Love Field (DAL) 1
WN 3821 Non-stop Boeing 737-800 (73H) 1:40 Effective 2026-08-06 through 2026-09-28
Mon,Thu,Fri,Sun 20:55 Denver (DEN) 22:40 Eugene (EUG)
WN 3821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:45 Effective 2026-06-04 through 2026-08-03
Tue,Wed 21:25 Denver (DEN) 23:10 Eugene (EUG)
WN 3821 Non-stop Boeing 737-700 (Scimitar Winglets) 2:45 Effective 2026-06-09 through 2026-07-29
Non-Direct Flights:
Mon,Thu,Fri 13:35 Cleveland (CLE) 17:25 Reno (RNO)
WN 3821 1-stop Boeing 737 MAX 8 (7M8) 6:50 Effective 2026-03-05 through 2026-04-06
This flight number is listed as serving the following routes:


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Southwest Airlines flight WN 3821: Multiple routes
Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Southwest Airlines WN3821
06:10
Phoenix Sky Harbor (PHX) 4

11:25
Chicago Midway (MDW)
Effective 2026-04-12 through 2026-05-17
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:15, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3821
06:10
Phoenix Sky Harbor (PHX) 4

11:25
Chicago Midway (MDW)
Operates only on 2026-05-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:15, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3821
06:40
Phoenix Sky Harbor (PHX) 4

11:55
Chicago Midway (MDW)
Effective 2026-04-07 through 2026-06-03
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
-
Duration: 3:15, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3821
06:55
Phoenix Sky Harbor (PHX) 4

12:10
Chicago Midway (MDW)
Operates only on 2026-05-24
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:15, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3821
07:00
Phoenix Sky Harbor (PHX) 4

12:15
Chicago Midway (MDW)
Effective 2026-04-11 through 2026-05-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 3:15, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN3821
12:50
Cleveland (CLE)

14:25
Las Vegas Harry Reid (LAS) 1
Effective 2026-03-08 through 2026-04-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 4:35, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN3821
13:35
Cleveland (CLE)

15:15
Las Vegas Harry Reid (LAS) 1
Effective 2026-03-05 through 2026-04-06
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 4:40, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3821
15:35
Cleveland (CLE)

17:15
Las Vegas Harry Reid (LAS) 1
Effective 2026-03-10 through 2026-04-01
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 4:40, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN3821
15:55
Las Vegas Harry Reid (LAS) 1

17:25
Reno (RNO)
Effective 2026-03-05 through 2026-04-06
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:30, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3821
16:15
Cleveland (CLE)

17:55
Las Vegas Harry Reid (LAS) 1
Effective 2026-03-07 through 2026-04-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 4:40, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3821
20:10
Saint Louis (STL) 2

22:55
Raleigh/Durham (RDU) 1
Effective 2026-02-12 through 2026-02-16
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 1:45, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN3821
20:10
Saint Louis (STL) 2

22:55
Raleigh/Durham (RDU) 1
Effective 2026-02-20 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 1:45, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN3821
20:45
Saint Louis (STL) 2

22:25
Dallas Love Field (DAL) 1
Effective 2026-08-04 through 2026-09-30
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:40, non-stop
Boeing 737 MAX 8 (7M8)
Direct Flights:
Southwest Airlines WN3821
20:45
Saint Louis (STL) 2

22:25
Dallas Love Field (DAL) 1
Effective 2026-08-06 through 2026-09-28
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 1:40, non-stop
Boeing 737-800 (73H)
Direct Flights:
Southwest Airlines WN3821
20:55
Denver (DEN)

22:40
Eugene (EUG)
Effective 2026-06-04 through 2026-08-03
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
Duration: 2:45, non-stop
Boeing 737-700 (Scimitar Winglets)
Direct Flights:
Southwest Airlines WN3821
21:25
Denver (DEN)

23:10
Eugene (EUG)
Effective 2026-06-09 through 2026-07-29
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:45, non-stop
Boeing 737-700 (Scimitar Winglets)
Non-Direct Flights:
Southwest Airlines WN3821
13:35
Cleveland (CLE)

17:25
Reno (RNO)
Effective 2026-03-05 through 2026-04-06
Mon
Tue
-
Wed
-
Thu
Fri
Sat
-
Sun
-
Duration: 6:50, 1-stop
Boeing 737 MAX 8 (7M8)
This flight number is listed as serving the following routes:
  • Cleveland (CLE) - Las Vegas Harry Reid (LAS)
  • Cleveland (CLE) - Reno (RNO)
  • Denver (DEN) - Eugene (EUG)
  • Las Vegas Harry Reid (LAS) - Reno (RNO)
  • Phoenix Sky Harbor (PHX) - Chicago Midway (MDW)
  • Saint Louis (STL) - Dallas Love Field (DAL)
  • Saint Louis (STL) - Raleigh/Durham (RDU)
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