KLM flight KL 6521: Multiple routes

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FLIGHT SCHEDULE
Direct Codeshare Flights:
Tue,Sat 07:00 Santa Ana (SNA) 10:02 Salt Lake City (SLC) KL 6521 Non-stop Airbus A220-100 (221) 2:02 Effective 2025-05-10 through 2025-05-24 Codeshare flight, operated by Delta Air Lines.(DL 1185)
Tue,Sat 07:00 Santa Ana (SNA) 09:59 Salt Lake City (SLC) KL 6521 Non-stop Airbus A220-100 (221) 1:59 Effective 2025-07-08 through 2025-08-09 Codeshare flight, operated by Delta Air Lines.(DL 1185)
Mon,Tue,Thu,Sat 07:00 Santa Ana (SNA) 09:59 Salt Lake City (SLC) KL 6521 Non-stop Airbus A220-100 (221) 1:59 Effective 2025-08-11 through 2025-09-06 Codeshare flight, operated by Delta Air Lines.(DL 1185)
Tue,Sat 07:00 Santa Ana (SNA) 10:04 Salt Lake City (SLC) KL 6521 Non-stop Airbus A220-100 (221) 2:04 Effective 2025-09-09 through 2025-10-04 Codeshare flight, operated by Delta Air Lines.(DL 1185)
Mon,Tue,Thu,Sat 07:00 Santa Ana (SNA) 10:04 Salt Lake City (SLC) KL 6521 Non-stop Airbus A220-100 (221) 2:04 Effective 2025-10-06 through 2025-10-23 Codeshare flight, operated by Delta Air Lines.(DL 1185)
Mon,Tue,Thu,Sat 07:05 Santa Ana (SNA) 10:02 Salt Lake City (SLC) KL 6521 Non-stop Airbus A220-100 (221) 1:57 Valid until 2025-05-06 Codeshare flight, operated by Delta Air Lines.(DL 1185)
Sun 07:45 Santa Ana (SNA) 10:44 Salt Lake City (SLC) KL 6521 Non-stop Airbus A220-100 (221) 1:59 Operates only on 2025-08-31 Codeshare flight, operated by Delta Air Lines.(DL 1185)
Daily 10:50 Syracuse (SYR) 12:13 New York John F. Kennedy (JFK) 4 KL 6521 Non-stop Canadair CRJ 900 (CR9) 1:23 Effective 2025-10-26 through 2025-12-23 Codeshare flight, operated by Delta Air Lines.(DL 5436)
Mon,Sun 10:50 Syracuse (SYR) 12:13 New York John F. Kennedy (JFK) 4 KL 6521 Non-stop Canadair CRJ 900 (CR9) 1:23 Effective 2026-01-04 through 2026-01-05 Codeshare flight, operated by Delta Air Lines.(DL 5436)
Daily 10:50 Syracuse (SYR) 12:17 New York John F. Kennedy (JFK) 4 KL 6521 Non-stop Canadair CRJ 900 (CR9) 1:27 Effective from 2026-01-06 Codeshare flight, operated by Delta Air Lines.(DL 5436)
Tue,Sat,Sun 13:05 Santa Ana (SNA) 15:59 Salt Lake City (SLC) KL 6521 Non-stop Airbus A220-100 (221) 1:54 Effective 2025-05-25 through 2025-06-01 Codeshare flight, operated by Delta Air Lines.(DL 1556)
Mon,Tue,Thu-Sat 13:05 Santa Ana (SNA) 15:59 Salt Lake City (SLC) KL 6521 Non-stop Airbus A220-100 (221) 1:54 Effective 2025-06-02 through 2025-06-07 Codeshare flight, operated by Delta Air Lines.(DL 1556)
Sun 13:05 Santa Ana (SNA) 16:00 Salt Lake City (SLC) KL 6521 Non-stop Airbus A220-100 (221) 1:55 Effective 2025-06-08 through 2025-07-06 Codeshare flight, operated by Delta Air Lines.(DL 1121)
Thu 13:10 Santa Ana (SNA) 16:05 Salt Lake City (SLC) KL 6521 Non-stop Airbus A220-100 (221) 1:55 Operates only on 2025-07-03 Codeshare flight, operated by Delta Air Lines.(DL 1121)
Wed 13:49 Santa Ana (SNA) 16:40 Salt Lake City (SLC) KL 6521 Non-stop Airbus A220-100 (221) 1:51 Effective 2025-06-11 through 2025-07-02 Codeshare flight, operated by Delta Air Lines.(DL 1121)
Wed 13:50 Santa Ana (SNA) 16:40 Salt Lake City (SLC) KL 6521 Non-stop Airbus A220-100 (221) 1:50 Effective 2025-05-07 through 2025-06-04 Codeshare flight, operated by Delta Air Lines.(DL 1556)

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This flight number is listed as serving the following routes:

Santa Ana (SNA) - Salt Lake City (SLC)
Syracuse (SYR) - New York John F. Kennedy (JFK)

All KLM flights

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KLM flight KL 6521: Multiple routes

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FLIGHT SCHEDULE

Direct Codeshare Flights:

KLM KL6521

07:00

Santa Ana (SNA)

10:02

Salt Lake City (SLC)

Effective 2025-05-10 through 2025-05-24

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 1185)

Duration: 2:02, non-stop
Airbus A220-100 (221)

KLM KL6521

07:00

Santa Ana (SNA)

09:59

Salt Lake City (SLC)

Effective 2025-07-08 through 2025-08-09

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 1185)

Duration: 1:59, non-stop
Airbus A220-100 (221)

KLM KL6521

07:00

Santa Ana (SNA)

09:59

Salt Lake City (SLC)

Effective 2025-08-11 through 2025-09-06

Mon

Tue

Wed
-

Thu

Fri
-

Sat

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 1185)

Duration: 1:59, non-stop
Airbus A220-100 (221)

KLM KL6521

07:00

Santa Ana (SNA)

10:04

Salt Lake City (SLC)

Effective 2025-09-09 through 2025-10-04

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 1185)

Duration: 2:04, non-stop
Airbus A220-100 (221)

KLM KL6521

07:00

Santa Ana (SNA)

10:04

Salt Lake City (SLC)

Effective 2025-10-06 through 2025-10-23

Mon

Tue

Wed
-

Thu

Fri
-

Sat

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 1185)

Duration: 2:04, non-stop
Airbus A220-100 (221)

KLM KL6521

07:05

Santa Ana (SNA)

10:02

Salt Lake City (SLC)

Valid until 2025-05-06

Mon

Tue

Wed
-

Thu

Fri
-

Sat

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 1185)

Duration: 1:57, non-stop
Airbus A220-100 (221)

KLM KL6521

07:45

Santa Ana (SNA)

10:44

Salt Lake City (SLC)

Operates only on 2025-08-31

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 1185)

Duration: 1:59, non-stop
Airbus A220-100 (221)

KLM KL6521

10:50

Syracuse (SYR)

12:13

New York John F. Kennedy (JFK) 4

Effective 2025-10-26 through 2025-12-23

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 5436)

Duration: 1:23, non-stop
Canadair CRJ 900 (CR9)

KLM KL6521

10:50

Syracuse (SYR)

12:13

New York John F. Kennedy (JFK) 4

Effective 2026-01-04 through 2026-01-05

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 5436)

Duration: 1:23, non-stop
Canadair CRJ 900 (CR9)

KLM KL6521

10:50

Syracuse (SYR)

12:17

New York John F. Kennedy (JFK) 4

Effective from 2026-01-06

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 5436)

Duration: 1:27, non-stop
Canadair CRJ 900 (CR9)

KLM KL6521

13:05

Santa Ana (SNA)

15:59

Salt Lake City (SLC)

Effective 2025-05-25 through 2025-06-01

Mon
-

Tue

Wed
-

Thu
-

Fri
-

Sat

Sun

Codeshare flight, operated by Delta Air Lines. (DL 1556)

Duration: 1:54, non-stop
Airbus A220-100 (221)

KLM KL6521

13:05

Santa Ana (SNA)

15:59

Salt Lake City (SLC)

Effective 2025-06-02 through 2025-06-07

Mon

Tue

Wed
-

Thu

Fri

Sat

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 1556)

Duration: 1:54, non-stop
Airbus A220-100 (221)

KLM KL6521

13:05

Santa Ana (SNA)

16:00

Salt Lake City (SLC)

Effective 2025-06-08 through 2025-07-06

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by Delta Air Lines. (DL 1121)

Duration: 1:55, non-stop
Airbus A220-100 (221)

KLM KL6521

13:10

Santa Ana (SNA)

16:05

Salt Lake City (SLC)

Operates only on 2025-07-03

Mon
-

Tue
-

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 1121)

Duration: 1:55, non-stop
Airbus A220-100 (221)

KLM KL6521

13:49

Santa Ana (SNA)

16:40

Salt Lake City (SLC)

Effective 2025-06-11 through 2025-07-02

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 1121)

Duration: 1:51, non-stop
Airbus A220-100 (221)

KLM KL6521

13:50

Santa Ana (SNA)

16:40

Salt Lake City (SLC)

Effective 2025-05-07 through 2025-06-04

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by Delta Air Lines. (DL 1556)

Duration: 1:50, non-stop
Airbus A220-100 (221)

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Parallax here -

This flight number is listed as serving the following routes:

Santa Ana (SNA) - Salt Lake City (SLC)
Syracuse (SYR) - New York John F. Kennedy (JFK)

All KLM flights

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- CACHE: False - LANG: en - IS_EU: False