Allegiant Air flight G4 21: Multiple routes

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FLIGHT SCHEDULE
Direct Flights:
Mon 08:18 Fresno (FAT) 09:31 Las Vegas Harry Reid (LAS) 1
G4 21 Non-stop Airbus A319 (319) 1:13 Operates only on 2025-06-09
Mon,Fri 08:23 Fresno (FAT) 09:36 Las Vegas Harry Reid (LAS) 1
G4 21 Non-stop Airbus A319 (319) 1:13 Effective 2025-06-13 through 2025-06-30
Fri 10:09 Fresno (FAT) 11:26 Las Vegas Harry Reid (LAS) 1
G4 21 Non-stop Airbus A319 (319) 1:17 Operates only on 2025-05-16
Sun 14:50 Fresno (FAT) 16:03 Las Vegas Harry Reid (LAS) 1
G4 21 Non-stop Airbus A319 (319) 1:13 Effective 2025-06-08 through 2025-06-15
Sun 14:52 Fresno (FAT) 16:05 Las Vegas Harry Reid (LAS) 1
G4 21 Non-stop Airbus A319 (319) 1:13 Effective 2025-06-22 through 2025-08-10
Mon,Fri 15:27 Fresno (FAT) 16:40 Las Vegas Harry Reid (LAS) 1
G4 21 Non-stop Airbus A319 (319) 1:13 Effective 2025-07-04 through 2025-08-11
Mon 15:39 Santa Ana (SNA) 18:50 Idaho Falls (IDA)
G4 21 Non-stop Airbus A319 (319) 2:11 Effective 2025-10-06 through 2025-10-27
Fri 15:56 Fresno (FAT) 17:11 Las Vegas Harry Reid (LAS) 1
G4 21 Non-stop Airbus A319 (319) 1:15 Operates only on 2025-05-30
Mon 15:58 Santa Ana (SNA) 19:06 Idaho Falls (IDA)
G4 21 Non-stop Airbus A319 (319) 2:08 Effective 2025-11-10 through 2025-11-17
Mon,Fri 16:02 Fresno (FAT) 17:19 Las Vegas Harry Reid (LAS) 1
G4 21 Non-stop Airbus A319 (319) 1:17 Effective 2025-05-23 through 2025-05-26
Mon 16:51 Santa Ana (SNA) 20:02 Idaho Falls (IDA)
G4 21 Non-stop Airbus A319 (319) 2:11 Operates only on 2025-11-03
Fri 16:57 Fresno (FAT) 18:12 Las Vegas Harry Reid (LAS) 1
G4 21 Non-stop Airbus A319 (319) 1:15 Operates only on 2025-08-29
Mon 17:39 Santa Ana (SNA) 20:49 Idaho Falls (IDA)
G4 21 Non-stop Airbus A319 (319) 2:10 Effective 2025-09-08 through 2025-09-29
Fri 18:55 Santa Ana (SNA) 22:05 Idaho Falls (IDA)
G4 21 Non-stop Airbus A319 (319) 2:10 Effective 2025-09-05 through 2025-09-26
Fri 18:58 Santa Ana (SNA) 22:06 Idaho Falls (IDA)
G4 21 Non-stop Airbus A319 (319) 2:08 Effective 2025-11-07 through 2025-11-14
Sun 19:01 Fresno (FAT) 20:18 Las Vegas Harry Reid (LAS) 1
G4 21 Non-stop Airbus A320 (320) 1:17 Operates only on 2025-05-18
Fri 19:04 Santa Ana (SNA) 22:12 Idaho Falls (IDA)
G4 21 Non-stop Airbus A319 (319) 2:08 Effective 2025-10-03 through 2025-10-31
Fri 19:47 Fresno (FAT) 21:04 Las Vegas Harry Reid (LAS) 1
G4 21 Non-stop Airbus A320 (320) 1:17 Operates only on 2025-08-15
Fri 20:40 Pasco (PSC) 22:46 Las Vegas Harry Reid (LAS) 1
G4 21 Non-stop Airbus A319 (319) 2:06 Valid until 2025-05-09
Mon 21:33 Pasco (PSC) 23:39 Las Vegas Harry Reid (LAS) 1
G4 21 Non-stop Airbus A319 (319) 2:06 Valid until 2025-05-12
Mon 22:17 Fresno (FAT) 23:34 Las Vegas Harry Reid (LAS) 1
G4 21 Non-stop Airbus A319 (319) 1:17 Operates only on 2025-05-19
Sun 22:17 Fresno (FAT) 23:34 Las Vegas Harry Reid (LAS) 1
G4 21 Non-stop Airbus A319 (319) 1:17 Operates only on 2025-08-17
Wed 22:19 Fresno (FAT) 23:32 Las Vegas Harry Reid (LAS) 1
G4 21 Non-stop Airbus A319 (319) 1:13 Operates only on 2025-07-02
Sun 22:24 Fresno (FAT) 23:38 Las Vegas Harry Reid (LAS) 1
G4 21 Non-stop Airbus A319 (319) 1:14 Operates only on 2025-06-01
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This flight number is listed as serving the following routes:
Allegiant Air flight G4 21: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:

Allegiant Air G421
Operates only on 2025-06-09
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:13, non-stop
Airbus A319 (319)

Allegiant Air G421
Effective 2025-06-13 through 2025-06-30
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 1:13, non-stop
Airbus A319 (319)

Allegiant Air G421
Operates only on 2025-05-16
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
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Duration: 1:17, non-stop
Airbus A319 (319)

Allegiant Air G421
Effective 2025-06-08 through 2025-06-15
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:13, non-stop
Airbus A319 (319)

Allegiant Air G421
Effective 2025-06-22 through 2025-08-10
Mon
-
Tue
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Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:13, non-stop
Airbus A319 (319)

Allegiant Air G421
Effective 2025-07-04 through 2025-08-11
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 1:13, non-stop
Airbus A319 (319)

Allegiant Air G421
Effective 2025-10-06 through 2025-10-27
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
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Duration: 2:11, non-stop
Airbus A319 (319)

Allegiant Air G421
Operates only on 2025-05-30
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 1:15, non-stop
Airbus A319 (319)

Allegiant Air G421
Effective 2025-11-10 through 2025-11-17
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:08, non-stop
Airbus A319 (319)

Allegiant Air G421
Effective 2025-05-23 through 2025-05-26
Mon
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 1:17, non-stop
Airbus A319 (319)

Allegiant Air G421
Operates only on 2025-11-03
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:11, non-stop
Airbus A319 (319)

Allegiant Air G421
Operates only on 2025-08-29
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 1:15, non-stop
Airbus A319 (319)

Allegiant Air G421
Effective 2025-09-08 through 2025-09-29
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:10, non-stop
Airbus A319 (319)

Allegiant Air G421
Effective 2025-09-05 through 2025-09-26
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 2:10, non-stop
Airbus A319 (319)

Allegiant Air G421
Effective 2025-11-07 through 2025-11-14
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 2:08, non-stop
Airbus A319 (319)

Allegiant Air G421
Operates only on 2025-05-18
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:17, non-stop
Airbus A320 (320)

Allegiant Air G421
Effective 2025-10-03 through 2025-10-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 2:08, non-stop
Airbus A319 (319)

Allegiant Air G421
Operates only on 2025-08-15
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 1:17, non-stop
Airbus A320 (320)

Allegiant Air G421
Valid until 2025-05-09
Mon
-
Tue
-
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Duration: 2:06, non-stop
Airbus A319 (319)

Allegiant Air G421
Valid until 2025-05-12
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:06, non-stop
Airbus A319 (319)

Allegiant Air G421
Operates only on 2025-05-19
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:17, non-stop
Airbus A319 (319)

Allegiant Air G421
Operates only on 2025-08-17
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:17, non-stop
Airbus A319 (319)

Allegiant Air G421
Operates only on 2025-07-02
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:13, non-stop
Airbus A319 (319)

Allegiant Air G421
Operates only on 2025-06-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:14, non-stop
Airbus A319 (319)
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Parallax here -
This flight number is listed as serving the following routes:
  • Fresno (FAT) - Las Vegas Harry Reid (LAS)
  • Pasco (PSC) - Las Vegas Harry Reid (LAS)
  • Santa Ana (SNA) - Idaho Falls (IDA)