Finnair flight AY 3666: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Daily 07:08 Phoenix Sky Harbor (PHX) 4 13:48 New York John F. Kennedy (JFK) 8
AY 3666 Non-stop Boeing 737 MAX 8 (7M8) 4:40 Effective 2026-01-06 through 2026-01-28
Codeshare flight, operated by American Airlines.(AA 636)
Sat 07:08 Phoenix Sky Harbor (PHX) 4 13:48 New York John F. Kennedy (JFK) 8
AY 3666 Non-stop Boeing 737 MAX 8 (7M8) 4:40 Operates only on 2026-01-31
Codeshare flight, operated by American Airlines.(AA 636)
Sat 07:15 Phoenix Sky Harbor (PHX) 4 13:50 New York John F. Kennedy (JFK) 8
AY 3666 Non-stop Boeing 737-800 (738) 4:35 Effective 2026-02-14 through 2026-03-07
Codeshare flight, operated by American Airlines.(AA 1163)
Mon-Fri,Sun 07:20 Phoenix Sky Harbor (PHX) 4 14:00 New York John F. Kennedy (JFK) 8
AY 3666 Non-stop Boeing 737 MAX 8 (7M8) 4:40 Effective 2026-01-29 through 2026-02-11
Codeshare flight, operated by American Airlines.(AA 636)
Mon-Fri,Sun 07:20 Phoenix Sky Harbor (PHX) 4 13:59 New York John F. Kennedy (JFK) 8
AY 3666 Non-stop Boeing 737 MAX 8 (7M8) 4:39 Effective 2026-02-12 through 2026-03-06
Codeshare flight, operated by American Airlines.(AA 636)
Sat 07:50 Phoenix Sky Harbor (PHX) 4 14:30 New York John F. Kennedy (JFK) 8
AY 3666 Non-stop Boeing 737 MAX 8 (7M8) 4:40 Operates only on 2026-02-07
Codeshare flight, operated by American Airlines.(AA 636)
Daily 09:20 Las Vegas Harry Reid (LAS) 1 17:27 New York John F. Kennedy (JFK) 8
AY 3666 Non-stop Airbus A321neo (32Q) 5:07 Effective 2026-04-07 through 2026-05-20
Codeshare flight, operated by American Airlines.(AA 556)
Mon,Wed,Sat 09:49 Houston George Bush (IAH) A 13:37 Miami (MIA)
AY 3666 Non-stop Boeing 737-800 (738) 2:48 Valid until 2026-01-05
Codeshare flight, operated by American Airlines.(AA 696)
Daily 20:20 Chicago O'Hare (ORD) 3 22:59 Louisville (SDF)
AY 3666 Non-stop Embraer EMB 175 (E75) 1:39 Effective 2026-05-21 through 2026-07-01
Codeshare flight, operated by American Airlines.(AA 4603)
Daily 20:20 Chicago O'Hare (ORD) 3 23:03 Louisville (SDF)
AY 3666 Non-stop Embraer EMB 175 (E75) 1:43 Effective 2026-07-02 through 2026-08-04
Codeshare flight, operated by American Airlines.(AA 4603)
Daily 20:20 Chicago O'Hare (ORD) 3 23:01 Louisville (SDF)
AY 3666 Non-stop Embraer EMB 175 (E75) 1:41 Effective 2026-08-05 through 2026-08-14
Codeshare flight, operated by American Airlines.(AA 4603)
Tue-Fri,Sun 20:20 Chicago O'Hare (ORD) 3 23:01 Louisville (SDF)
AY 3666 Non-stop Embraer EMB 175 (E75) 1:41 Effective 2026-08-16 through 2026-09-04
Codeshare flight, operated by American Airlines.(AA 4603)
Tue,Sat,Sun 20:20 Chicago O'Hare (ORD) 3 23:01 Louisville (SDF)
AY 3666 Non-stop Embraer EMB 175 (E75) 1:41 Effective 2026-09-05 through 2026-09-08
Codeshare flight, operated by American Airlines.(AA 4603)
Tue-Sun 20:20 Chicago O'Hare (ORD) 3 22:58 Louisville (SDF)
AY 3666 Non-stop Embraer EMB 175 (E75) 1:38 Effective 2026-09-09 through 2026-09-27
Codeshare flight, operated by American Airlines.(AA 4603)
Daily 20:20 Chicago O'Hare (ORD) 3 22:58 Louisville (SDF)
AY 3666 Non-stop Embraer EMB 175 (E75) 1:38 Effective 2026-09-28 through 2026-10-04
Codeshare flight, operated by American Airlines.(AA 4603)
Daily 20:20 Chicago O'Hare (ORD) 3 22:55 Louisville (SDF)
AY 3666 Non-stop Embraer EMB 175 (E75) 1:35 Effective 2026-10-05 through 2026-10-24
Codeshare flight, operated by American Airlines.(AA 4603)
Tue,Fri 20:20 Chicago O'Hare (ORD) 3 22:55 Louisville (SDF)
AY 3666 Non-stop Embraer EMB 175 (E75) 1:35 Effective from 2026-10-27
Codeshare flight, operated by American Airlines.(AA 4603)
Mon,Wed,Sat 21:07 Miami (MIA) 22:45 Nashville (BNA)
AY 3666 Non-stop Boeing 737-800 (738) 2:38 Effective 2026-03-30 through 2026-04-06
Codeshare flight, operated by American Airlines.(AA 1173)
Sat 22:27 Miami (MIA) 23:59 Nashville (BNA)
AY 3666 Non-stop Boeing 737-800 (738) 2:32 Operates only on 2026-03-28
Codeshare flight, operated by American Airlines.(AA 2766)
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This flight number is listed as serving the following routes:


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Finnair flight AY 3666: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Finnair AY3666
07:08
Phoenix Sky Harbor (PHX) 4

13:48
New York John F. Kennedy (JFK) 8
Effective 2026-01-06 through 2026-01-28
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 636)
Duration: 4:40, non-stop
Boeing 737 MAX 8 (7M8)
Direct Codeshare Flights:
Finnair AY3666
07:08
Phoenix Sky Harbor (PHX) 4

13:48
New York John F. Kennedy (JFK) 8
Operates only on 2026-01-31
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by American Airlines. (AA 636)
Duration: 4:40, non-stop
Boeing 737 MAX 8 (7M8)
Direct Codeshare Flights:
Finnair AY3666
07:15
Phoenix Sky Harbor (PHX) 4

13:50
New York John F. Kennedy (JFK) 8
Effective 2026-02-14 through 2026-03-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by American Airlines. (AA 1163)
Duration: 4:35, non-stop
Boeing 737-800 (738)
Direct Codeshare Flights:
Finnair AY3666
07:20
Phoenix Sky Harbor (PHX) 4

14:00
New York John F. Kennedy (JFK) 8
Effective 2026-01-29 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by American Airlines. (AA 636)
Duration: 4:40, non-stop
Boeing 737 MAX 8 (7M8)
Direct Codeshare Flights:
Finnair AY3666
07:20
Phoenix Sky Harbor (PHX) 4

13:59
New York John F. Kennedy (JFK) 8
Effective 2026-02-12 through 2026-03-06
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by American Airlines. (AA 636)
Duration: 4:39, non-stop
Boeing 737 MAX 8 (7M8)
Direct Codeshare Flights:
Finnair AY3666
07:50
Phoenix Sky Harbor (PHX) 4

14:30
New York John F. Kennedy (JFK) 8
Operates only on 2026-02-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by American Airlines. (AA 636)
Duration: 4:40, non-stop
Boeing 737 MAX 8 (7M8)
Direct Codeshare Flights:
Finnair AY3666
09:20
Las Vegas Harry Reid (LAS) 1

17:27
New York John F. Kennedy (JFK) 8
Effective 2026-04-07 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 556)
Duration: 5:07, non-stop
Airbus A321neo (32Q)
Direct Codeshare Flights:
Finnair AY3666
09:49
Houston George Bush (IAH) A

13:37
Miami (MIA)
Valid until 2026-01-05
Mon
Tue
-
Wed
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by American Airlines. (AA 696)
Duration: 2:48, non-stop
Boeing 737-800 (738)
Direct Codeshare Flights:
Finnair AY3666
20:20
Chicago O'Hare (ORD) 3

22:59
Louisville (SDF)
Effective 2026-05-21 through 2026-07-01
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 4603)
Duration: 1:39, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Finnair AY3666
20:20
Chicago O'Hare (ORD) 3

23:03
Louisville (SDF)
Effective 2026-07-02 through 2026-08-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 4603)
Duration: 1:43, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Finnair AY3666
20:20
Chicago O'Hare (ORD) 3

23:01
Louisville (SDF)
Effective 2026-08-05 through 2026-08-14
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 4603)
Duration: 1:41, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Finnair AY3666
20:20
Chicago O'Hare (ORD) 3

23:01
Louisville (SDF)
Effective 2026-08-16 through 2026-09-04
Mon
-
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by American Airlines. (AA 4603)
Duration: 1:41, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Finnair AY3666
20:20
Chicago O'Hare (ORD) 3

23:01
Louisville (SDF)
Effective 2026-09-05 through 2026-09-08
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 4603)
Duration: 1:41, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Finnair AY3666
20:20
Chicago O'Hare (ORD) 3

22:58
Louisville (SDF)
Effective 2026-09-09 through 2026-09-27
Mon
-
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 4603)
Duration: 1:38, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Finnair AY3666
20:20
Chicago O'Hare (ORD) 3

22:58
Louisville (SDF)
Effective 2026-09-28 through 2026-10-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 4603)
Duration: 1:38, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Finnair AY3666
20:20
Chicago O'Hare (ORD) 3

22:55
Louisville (SDF)
Effective 2026-10-05 through 2026-10-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 4603)
Duration: 1:35, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Finnair AY3666
20:20
Chicago O'Hare (ORD) 3

22:55
Louisville (SDF)
Effective from 2026-10-27
Mon
-
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Codeshare flight, operated by American Airlines. (AA 4603)
Duration: 1:35, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Finnair AY3666
21:07
Miami (MIA)

22:45
Nashville (BNA)
Effective 2026-03-30 through 2026-04-06
Mon
Tue
-
Wed
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by American Airlines. (AA 1173)
Duration: 2:38, non-stop
Boeing 737-800 (738)
Direct Codeshare Flights:
Finnair AY3666
22:27
Miami (MIA)

23:59
Nashville (BNA)
Operates only on 2026-03-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by American Airlines. (AA 2766)
Duration: 2:32, non-stop
Boeing 737-800 (738)
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This flight number is listed as serving the following routes:
  • Chicago O'Hare (ORD) - Louisville (SDF)
  • Houston George Bush (IAH) - Miami (MIA)
  • Las Vegas Harry Reid (LAS) - New York John F. Kennedy (JFK)
  • Miami (MIA) - Nashville (BNA)
  • Phoenix Sky Harbor (PHX) - New York John F. Kennedy (JFK)
All Finnair flights
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