KLM flight KL 8521: Multiple routes

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FLIGHT SCHEDULE
Direct Codeshare Flights:
Sun 06:00 Tromso (TOS) 08:00 Oslo Gardermoen (OSL) KL 8521 Non-stop Airbus A320neo (32N) 2:00 Operates only on 2026-06-21 Codeshare flight, operated by SAS.(SK 4403)
Mon-Sat 06:00 Harstad/Narvik (EVE) 08:00 Oslo Gardermoen (OSL) KL 8521 Non-stop Airbus A320neo (32N) 2:00 Effective from 2026-10-26 Codeshare flight, operated by SAS.(SK 4079)
Sun 12:30 Harstad/Narvik (EVE) 14:20 Oslo Gardermoen (OSL) KL 8521 Non-stop Airbus A320neo (32N) 1:50 Effective from 2026-10-25 Codeshare flight, operated by SAS.(SK 4087)
Fri 12:35 Longyearbyen (LYR) 14:10 Tromso (TOS) KL 8521 Non-stop Airbus A320neo (32N) 1:35 Effective 2026-04-03 through 2026-06-19 Codeshare flight, operated by SAS.(SK 4425)
Fri 12:35 Longyearbyen (LYR) 14:10 Tromso (TOS) KL 8521 Non-stop Airbus A320neo (32N) 1:35 Effective 2026-08-14 through 2026-10-23 Codeshare flight, operated by SAS.(SK 4425)
Wed 13:30 Longyearbyen (LYR) 15:05 Tromso (TOS) KL 8521 Non-stop Airbus A320neo (32N) 1:35 Effective 2026-06-24 through 2026-07-15 Codeshare flight, operated by SAS.(SK 4425)
Wed,Sun 13:30 Longyearbyen (LYR) 15:05 Tromso (TOS) KL 8521 Non-stop Airbus A320neo (32N) 1:35 Effective 2026-07-19 through 2026-07-29 Codeshare flight, operated by SAS.(SK 4425)
Wed,Sun 13:30 Longyearbyen (LYR) 15:05 Tromso (TOS) KL 8521 Non-stop Airbus A320neo (32N) 1:35 Effective 2026-08-05 through 2026-08-09 Codeshare flight, operated by SAS.(SK 4425)
Fri 15:10 Tromso (TOS) 17:05 Oslo Gardermoen (OSL) KL 8521 Non-stop Airbus A320neo (32N) 1:55 Effective 2026-04-03 through 2026-06-19 Codeshare flight, operated by SAS.(SK 4425)
Fri 15:10 Tromso (TOS) 17:05 Oslo Gardermoen (OSL) KL 8521 Non-stop Airbus A320neo (32N) 1:55 Effective 2026-08-14 through 2026-10-23 Codeshare flight, operated by SAS.(SK 4425)
Mon,Tue,Thu,Fri,Sun 16:05 Helsinki (HEL) 16:55 Copenhagen (CPH) 3 KL 8521 Non-stop Airbus A320neo (32N) 1:50 Valid until 2026-01-06 Codeshare flight, operated by SAS.(SK 1713)
Mon-Fri,Sun 16:05 Helsinki (HEL) 16:55 Copenhagen (CPH) 3 KL 8521 Non-stop Airbus A320neo (32N) 1:50 Effective 2026-01-07 through 2026-03-27 Codeshare flight, operated by SAS.(SK 1713)
Sat 16:05 Helsinki (HEL) 16:55 Copenhagen (CPH) 3 KL 8521 Non-stop Embraer EMB 195 (E95) 1:50 Effective 2026-01-17 through 2026-03-28 Codeshare flight, operated by SAS.(SK 1713)
Wed 16:05 Tromso (TOS) 18:00 Oslo Gardermoen (OSL) KL 8521 Non-stop Airbus A320neo (32N) 1:55 Effective 2026-06-24 through 2026-07-15 Codeshare flight, operated by SAS.(SK 4425)
Wed,Sun 16:05 Tromso (TOS) 18:00 Oslo Gardermoen (OSL) KL 8521 Non-stop Airbus A320neo (32N) 1:55 Effective 2026-07-19 through 2026-07-29 Codeshare flight, operated by SAS.(SK 4425)
Wed,Sun 16:05 Tromso (TOS) 18:00 Oslo Gardermoen (OSL) KL 8521 Non-stop Airbus A320neo (32N) 1:55 Effective 2026-08-05 through 2026-08-09 Codeshare flight, operated by SAS.(SK 4425)
Non-Direct Codeshare flights:
Fri 12:35 Longyearbyen (LYR) 17:05 Oslo Gardermoen (OSL) KL 8521 1-stop Airbus A320neo (32N) 4:30 Effective 2026-04-03 through 2026-06-19 Codeshare flight, operated by SAS.(SK 4425)
Fri 12:35 Longyearbyen (LYR) 17:05 Oslo Gardermoen (OSL) KL 8521 1-stop Airbus A320neo (32N) 4:30 Effective 2026-08-14 through 2026-10-23 Codeshare flight, operated by SAS.(SK 4425)
Wed 13:30 Longyearbyen (LYR) 18:00 Oslo Gardermoen (OSL) KL 8521 1-stop Airbus A320neo (32N) 4:30 Effective 2026-06-24 through 2026-07-15 Codeshare flight, operated by SAS.(SK 4425)
Wed,Sun 13:30 Longyearbyen (LYR) 18:00 Oslo Gardermoen (OSL) KL 8521 1-stop Airbus A320neo (32N) 4:30 Effective 2026-07-19 through 2026-07-29 Codeshare flight, operated by SAS.(SK 4425)
Wed,Sun 13:30 Longyearbyen (LYR) 18:00 Oslo Gardermoen (OSL) KL 8521 1-stop Airbus A320neo (32N) 4:30 Effective 2026-08-05 through 2026-08-09 Codeshare flight, operated by SAS.(SK 4425)

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This flight number is listed as serving the following routes:

Harstad/Narvik (EVE) - Oslo Gardermoen (OSL)
Helsinki (HEL) - Copenhagen (CPH)
Longyearbyen (LYR) - Oslo Gardermoen (OSL)
Longyearbyen (LYR) - Tromso (TOS)
Tromso (TOS) - Oslo Gardermoen (OSL)

All KLM flights

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KLM flight KL 8521: Multiple routes

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FLIGHT SCHEDULE

Direct Codeshare Flights:

KLM KL8521

06:00

Tromso (TOS)

08:00

Oslo Gardermoen (OSL)

Operates only on 2026-06-21

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by SAS. (SK 4403)

Duration: 2:00, non-stop
Airbus A320neo (32N)

Direct Codeshare Flights:

KLM KL8521

06:00

Harstad/Narvik (EVE)

08:00

Oslo Gardermoen (OSL)

Effective from 2026-10-26

Mon

Tue

Wed

Thu

Fri

Sat

Sun
-

Codeshare flight, operated by SAS. (SK 4079)

Duration: 2:00, non-stop
Airbus A320neo (32N)

Direct Codeshare Flights:

KLM KL8521

12:30

Harstad/Narvik (EVE)

14:20

Oslo Gardermoen (OSL)

Effective from 2026-10-25

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by SAS. (SK 4087)

Duration: 1:50, non-stop
Airbus A320neo (32N)

Direct Codeshare Flights:

KLM KL8521

12:35

Longyearbyen (LYR)

14:10

Tromso (TOS)

Effective 2026-04-03 through 2026-06-19

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Codeshare flight, operated by SAS. (SK 4425)

Duration: 1:35, non-stop
Airbus A320neo (32N)

Direct Codeshare Flights:

KLM KL8521

12:35

Longyearbyen (LYR)

14:10

Tromso (TOS)

Effective 2026-08-14 through 2026-10-23

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Codeshare flight, operated by SAS. (SK 4425)

Duration: 1:35, non-stop
Airbus A320neo (32N)

Direct Codeshare Flights:

KLM KL8521

13:30

Longyearbyen (LYR)

15:05

Tromso (TOS)

Effective 2026-06-24 through 2026-07-15

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by SAS. (SK 4425)

Duration: 1:35, non-stop
Airbus A320neo (32N)

Direct Codeshare Flights:

KLM KL8521

13:30

Longyearbyen (LYR)

15:05

Tromso (TOS)

Effective 2026-07-19 through 2026-07-29

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by SAS. (SK 4425)

Duration: 1:35, non-stop
Airbus A320neo (32N)

Direct Codeshare Flights:

KLM KL8521

13:30

Longyearbyen (LYR)

15:05

Tromso (TOS)

Effective 2026-08-05 through 2026-08-09

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by SAS. (SK 4425)

Duration: 1:35, non-stop
Airbus A320neo (32N)

Direct Codeshare Flights:

KLM KL8521

15:10

Tromso (TOS)

17:05

Oslo Gardermoen (OSL)

Effective 2026-04-03 through 2026-06-19

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Codeshare flight, operated by SAS. (SK 4425)

Duration: 1:55, non-stop
Airbus A320neo (32N)

Direct Codeshare Flights:

KLM KL8521

15:10

Tromso (TOS)

17:05

Oslo Gardermoen (OSL)

Effective 2026-08-14 through 2026-10-23

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Codeshare flight, operated by SAS. (SK 4425)

Duration: 1:55, non-stop
Airbus A320neo (32N)

Direct Codeshare Flights:

KLM KL8521

16:05

Helsinki (HEL)

16:55

Copenhagen (CPH) 3

Valid until 2026-01-06

Mon

Tue

Wed
-

Thu

Fri

Sat
-

Sun

Codeshare flight, operated by SAS. (SK 1713)

Duration: 1:50, non-stop
Airbus A320neo (32N)

Direct Codeshare Flights:

KLM KL8521

16:05

Helsinki (HEL)

16:55

Copenhagen (CPH) 3

Effective 2026-01-07 through 2026-03-27

Mon

Tue

Wed

Thu

Fri

Sat
-

Sun

Codeshare flight, operated by SAS. (SK 1713)

Duration: 1:50, non-stop
Airbus A320neo (32N)

Direct Codeshare Flights:

KLM KL8521

16:05

Helsinki (HEL)

16:55

Copenhagen (CPH) 3

Effective 2026-01-17 through 2026-03-28

Mon
-

Tue
-

Wed
-

Thu
-

Fri
-

Sat

Sun
-

Codeshare flight, operated by SAS. (SK 1713)

Duration: 1:50, non-stop
Embraer EMB 195 (E95)

Direct Codeshare Flights:

KLM KL8521

16:05

Tromso (TOS)

18:00

Oslo Gardermoen (OSL)

Effective 2026-06-24 through 2026-07-15

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by SAS. (SK 4425)

Duration: 1:55, non-stop
Airbus A320neo (32N)

Direct Codeshare Flights:

KLM KL8521

16:05

Tromso (TOS)

18:00

Oslo Gardermoen (OSL)

Effective 2026-07-19 through 2026-07-29

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by SAS. (SK 4425)

Duration: 1:55, non-stop
Airbus A320neo (32N)

Direct Codeshare Flights:

KLM KL8521

16:05

Tromso (TOS)

18:00

Oslo Gardermoen (OSL)

Effective 2026-08-05 through 2026-08-09

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by SAS. (SK 4425)

Duration: 1:55, non-stop
Airbus A320neo (32N)

Non-Direct Codeshare flights:

KLM KL8521

12:35

Longyearbyen (LYR)

17:05

Oslo Gardermoen (OSL)

Effective 2026-04-03 through 2026-06-19

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Codeshare flight, operated by SAS. (SK 4425)

Duration: 4:30, 1-stop
Airbus A320neo (32N)

Non-Direct Codeshare flights:

KLM KL8521

12:35

Longyearbyen (LYR)

17:05

Oslo Gardermoen (OSL)

Effective 2026-08-14 through 2026-10-23

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Codeshare flight, operated by SAS. (SK 4425)

Duration: 4:30, 1-stop
Airbus A320neo (32N)

Non-Direct Codeshare flights:

KLM KL8521

13:30

Longyearbyen (LYR)

18:00

Oslo Gardermoen (OSL)

Effective 2026-06-24 through 2026-07-15

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun
-

Codeshare flight, operated by SAS. (SK 4425)

Duration: 4:30, 1-stop
Airbus A320neo (32N)

Non-Direct Codeshare flights:

KLM KL8521

13:30

Longyearbyen (LYR)

18:00

Oslo Gardermoen (OSL)

Effective 2026-07-19 through 2026-07-29

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by SAS. (SK 4425)

Duration: 4:30, 1-stop
Airbus A320neo (32N)

Non-Direct Codeshare flights:

KLM KL8521

13:30

Longyearbyen (LYR)

18:00

Oslo Gardermoen (OSL)

Effective 2026-08-05 through 2026-08-09

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat
-

Sun

Codeshare flight, operated by SAS. (SK 4425)

Duration: 4:30, 1-stop
Airbus A320neo (32N)

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Parallax here -

This flight number is listed as serving the following routes:

Harstad/Narvik (EVE) - Oslo Gardermoen (OSL)
Helsinki (HEL) - Copenhagen (CPH)
Longyearbyen (LYR) - Oslo Gardermoen (OSL)
Longyearbyen (LYR) - Tromso (TOS)
Tromso (TOS) - Oslo Gardermoen (OSL)

All KLM flights

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