United Airlines flight UA 4521: Multiple routes

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FLIGHT SCHEDULE
Direct Flights:
Fri 13:17 Newark Liberty, New York (EWR) C 14:44 Buffalo (BUF) UA 4521 Non-stop Canadair CRJ 550 (CR5) 1:27 Operates only on 2025-05-16
Daily 13:20 Newark Liberty, New York (EWR) C 14:47 Buffalo (BUF) UA 4521 Non-stop Canadair CRJ 550 (CR5) 1:27 Valid until 2025-05-15
Mon-Wed,Sat,Sun 13:20 Newark Liberty, New York (EWR) C 14:47 Buffalo (BUF) UA 4521 Non-stop Canadair CRJ 550 (CR5) 1:27 Effective 2025-05-17 through 2025-05-21
Wed-Fri,Sun 14:39 Newark Liberty, New York (EWR) C 16:03 Buffalo (BUF) UA 4521 Non-stop Canadair CRJ 550 (CR5) 1:24 Effective 2025-05-22 through 2025-05-28
Thu,Fri 14:39 Newark Liberty, New York (EWR) C 16:03 Buffalo (BUF) UA 4521 Non-stop Canadair CRJ 550 (CR5) 1:24 Effective 2025-05-30 through 2025-06-06
Mon-Fri,Sun 14:39 Newark Liberty, New York (EWR) C 16:03 Buffalo (BUF) UA 4521 Non-stop Canadair CRJ 550 (CR5) 1:24 Effective 2025-06-08 through 2025-06-15
Sun 14:56 Newark Liberty, New York (EWR) C 16:24 Buffalo (BUF) UA 4521 Non-stop Canadair CRJ 550 (CR5) 1:28 Operates only on 2025-06-01
Thu-Sun 14:59 Newark Liberty, New York (EWR) C 16:29 Norfolk (ORF) UA 4521 Non-stop Canadair CRJ 550 (CR5) 1:30 Effective 2025-06-26 through 2025-08-03
Wed-Sun 14:59 Newark Liberty, New York (EWR) C 16:29 Norfolk (ORF) UA 4521 Non-stop Canadair CRJ 550 (CR5) 1:30 Effective 2025-08-06 through 2025-08-17
Daily 14:59 Newark Liberty, New York (EWR) C 16:26 Norfolk (ORF) UA 4521 Non-stop Canadair CRJ 550 (CR5) 1:27 Effective 2025-08-19 through 2025-09-24
Mon-Wed 15:00 Newark Liberty, New York (EWR) C 16:30 Norfolk (ORF) UA 4521 Non-stop Canadair CRJ 550 (CR5) 1:30 Effective 2025-06-30 through 2025-08-05
Mon,Tue 15:00 Newark Liberty, New York (EWR) C 16:30 Norfolk (ORF) UA 4521 Non-stop Canadair CRJ 550 (CR5) 1:30 Effective 2025-08-11 through 2025-08-18
Daily 15:05 Newark Liberty, New York (EWR) C 16:33 Norfolk (ORF) UA 4521 Non-stop Canadair CRJ 550 (CR5) 1:28 Effective 2025-09-25 through 2025-10-25
Sat 16:00 Newark Liberty, New York (EWR) C 17:28 Buffalo (BUF) UA 4521 Non-stop Canadair CRJ 550 (CR5) 1:28 Operates only on 2025-05-24
Sat 16:00 Newark Liberty, New York (EWR) C 17:28 Buffalo (BUF) UA 4521 Non-stop Canadair CRJ 550 (CR5) 1:28 Effective 2025-06-07 through 2025-06-14
Daily 16:00 Newark Liberty, New York (EWR) C 17:28 Buffalo (BUF) UA 4521 Non-stop Canadair CRJ 550 (CR5) 1:28 Effective 2025-06-16 through 2025-06-25
Daily 18:25 Chicago O'Hare (ORD) 2 21:13 Asheville/Hendersonville (AVL) UA 4521 Non-stop Canadair CRJ 550 (CR5) 1:48 Effective 2025-10-26 through 2025-12-17
Daily 18:25 Chicago O'Hare (ORD) 2 21:13 Asheville/Hendersonville (AVL) UA 4521 Non-stop Canadair CRJ 550 (CR5) 1:48 Effective from 2026-01-06
Daily 20:00 Chicago O'Hare (ORD) 2 22:48 Asheville/Hendersonville (AVL) UA 4521 Non-stop Canadair CRJ 550 (CR5) 1:48 Effective 2025-12-18 through 2026-01-05

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Parallax here -

This flight number is listed as serving the following routes:

Chicago O'Hare (ORD) - Asheville/Hendersonville (AVL)
Newark Liberty, New York (EWR) - Buffalo (BUF)
Newark Liberty, New York (EWR) - Norfolk (ORF)

All United Airlines flights

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United Airlines flight UA 4521: Multiple routes

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FLIGHT SCHEDULE

Direct Flights:

United Airlines UA4521

13:17

Newark Liberty, New York (EWR) C

14:44

Buffalo (BUF)

Operates only on 2025-05-16

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Duration: 1:27, non-stop
Canadair CRJ 550 (CR5)

United Airlines UA4521

13:20

Newark Liberty, New York (EWR) C

14:47

Buffalo (BUF)

Valid until 2025-05-15

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 1:27, non-stop
Canadair CRJ 550 (CR5)

United Airlines UA4521

13:20

Newark Liberty, New York (EWR) C

14:47

Buffalo (BUF)

Effective 2025-05-17 through 2025-05-21

Mon

Tue

Wed

Thu
-

Fri
-

Sat

Sun

Duration: 1:27, non-stop
Canadair CRJ 550 (CR5)

United Airlines UA4521

14:39

Newark Liberty, New York (EWR) C

16:03

Buffalo (BUF)

Effective 2025-05-22 through 2025-05-28

Mon
-

Tue
-

Wed

Thu

Fri

Sat
-

Sun

Duration: 1:24, non-stop
Canadair CRJ 550 (CR5)

United Airlines UA4521

14:39

Newark Liberty, New York (EWR) C

16:03

Buffalo (BUF)

Effective 2025-05-30 through 2025-06-06

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 1:24, non-stop
Canadair CRJ 550 (CR5)

United Airlines UA4521

14:39

Newark Liberty, New York (EWR) C

16:03

Buffalo (BUF)

Effective 2025-06-08 through 2025-06-15

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun

Duration: 1:24, non-stop
Canadair CRJ 550 (CR5)

United Airlines UA4521

14:56

Newark Liberty, New York (EWR) C

16:24

Buffalo (BUF)

Operates only on 2025-06-01

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 1:28, non-stop
Canadair CRJ 550 (CR5)

United Airlines UA4521

14:59

Newark Liberty, New York (EWR) C

16:29

Norfolk (ORF)

Effective 2025-06-26 through 2025-08-03

Mon
-

Tue
-

Wed
-

Thu

Fri

Sat

Sun

Duration: 1:30, non-stop
Canadair CRJ 550 (CR5)

United Airlines UA4521

14:59

Newark Liberty, New York (EWR) C

16:29

Norfolk (ORF)

Effective 2025-08-06 through 2025-08-17

Mon
-

Tue
-

Wed

Thu

Fri

Sat

Sun

Duration: 1:30, non-stop
Canadair CRJ 550 (CR5)

United Airlines UA4521

14:59

Newark Liberty, New York (EWR) C

16:26

Norfolk (ORF)

Effective 2025-08-19 through 2025-09-24

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 1:27, non-stop
Canadair CRJ 550 (CR5)

United Airlines UA4521

15:00

Newark Liberty, New York (EWR) C

16:30

Norfolk (ORF)

Effective 2025-06-30 through 2025-08-05

Mon

Tue

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:30, non-stop
Canadair CRJ 550 (CR5)

United Airlines UA4521

15:00

Newark Liberty, New York (EWR) C

16:30

Norfolk (ORF)

Effective 2025-08-11 through 2025-08-18

Mon

Tue

Wed
-

Thu
-

Fri
-

Sat
-

Sun
-

Duration: 1:30, non-stop
Canadair CRJ 550 (CR5)

United Airlines UA4521

15:05

Newark Liberty, New York (EWR) C

16:33

Norfolk (ORF)

Effective 2025-09-25 through 2025-10-25

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 1:28, non-stop
Canadair CRJ 550 (CR5)

United Airlines UA4521

16:00

Newark Liberty, New York (EWR) C

17:28

Buffalo (BUF)

Operates only on 2025-05-24

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 1:28, non-stop
Canadair CRJ 550 (CR5)

United Airlines UA4521

16:00

Newark Liberty, New York (EWR) C

17:28

Buffalo (BUF)

Effective 2025-06-07 through 2025-06-14

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Duration: 1:28, non-stop
Canadair CRJ 550 (CR5)

United Airlines UA4521

16:00

Newark Liberty, New York (EWR) C

17:28

Buffalo (BUF)

Effective 2025-06-16 through 2025-06-25

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 1:28, non-stop
Canadair CRJ 550 (CR5)

United Airlines UA4521

18:25

Chicago O'Hare (ORD) 2

21:13

Asheville/Hendersonville (AVL)

Effective 2025-10-26 through 2025-12-17

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 1:48, non-stop
Canadair CRJ 550 (CR5)

United Airlines UA4521

18:25

Chicago O'Hare (ORD) 2

21:13

Asheville/Hendersonville (AVL)

Effective from 2026-01-06

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 1:48, non-stop
Canadair CRJ 550 (CR5)

United Airlines UA4521

20:00

Chicago O'Hare (ORD) 2

22:48

Asheville/Hendersonville (AVL)

Effective 2025-12-18 through 2026-01-05

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 1:48, non-stop
Canadair CRJ 550 (CR5)

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Parallax here -

This flight number is listed as serving the following routes:

Chicago O'Hare (ORD) - Asheville/Hendersonville (AVL)
Newark Liberty, New York (EWR) - Buffalo (BUF)
Newark Liberty, New York (EWR) - Norfolk (ORF)

All United Airlines flights

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