Finnair flights from Saint Louis (STL) to Chicago O'Hare (ORD).

Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Daily 16:18 Saint Louis (STL) 1 17:43 Chicago O'Hare (ORD) 3
Finnair AY 3676 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:25 Effective 2026-08-05 through 2026-08-14
Codeshare flight, operated by American Airlines.(AA 3620)
Tue-Fri,Sun 16:18 Saint Louis (STL) 1 17:43 Chicago O'Hare (ORD) 3
Finnair AY 3676 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:25 Effective 2026-08-16 through 2026-09-01
Codeshare flight, operated by American Airlines.(AA 3620)
Tue 16:18 Saint Louis (STL) 1 17:43 Chicago O'Hare (ORD) 3
Finnair AY 3676 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:25 Operates only on 2026-09-08
Codeshare flight, operated by American Airlines.(AA 3620)
Tue-Sun 16:29 Saint Louis (STL) 1 18:00 Chicago O'Hare (ORD) 3
Finnair AY 3676 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:31 Effective 2026-09-09 through 2026-09-27
Codeshare flight, operated by American Airlines.(AA 4282Z)
Daily 16:29 Saint Louis (STL) 1 18:00 Chicago O'Hare (ORD) 3
Finnair AY 3676 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:31 Effective 2026-09-28 through 2026-10-04
Codeshare flight, operated by American Airlines.(AA 4282Z)
Wed-Sun 16:18 Saint Louis (STL) 1 17:43 Chicago O'Hare (ORD) 3
Finnair AY 3680 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:25 Effective 2026-09-02 through 2026-09-06
Codeshare flight, operated by American Airlines.(AA 3620)
Mon,Wed,Sun 18:29 Saint Louis (STL) 1 19:50 Chicago O'Hare (ORD) 3
Finnair AY 4014 Non-stop Canadair CRJ 700 (CR7) 1:21 Effective 2026-04-08 through 2026-04-29
Codeshare flight, operated by American Airlines.(AA 6399)
Thu,Sat 18:29 Saint Louis (STL) 1 19:50 Chicago O'Hare (ORD) 3
Finnair AY 4016 Non-stop Canadair CRJ 700 (CR7) 1:21 Effective 2026-04-09 through 2026-04-30
Codeshare flight, operated by American Airlines.(AA 6399)
Mon,Wed,Fri,Sun 18:15 Saint Louis (STL) 1 19:50 Chicago O'Hare (ORD) 3
Finnair AY 4102 Non-stop Embraer EMB 175 (E75) 1:35 Effective 2026-07-03 through 2026-08-03
Codeshare flight, operated by American Airlines.(AA 4537)
Sun 18:33 Saint Louis (STL) 1 20:08 Chicago O'Hare (ORD) 3
Finnair AY 4102 Non-stop Embraer EMB 175 (E75) 1:35 Effective 2026-03-29 through 2026-04-05
Codeshare flight, operated by American Airlines.(AA 3714)
Mon,Wed,Thu,Sat 18:33 Saint Louis (STL) 1 20:08 Chicago O'Hare (ORD) 3
Finnair AY 4102 Non-stop Embraer EMB 170 / EMB 175 (E70) 1:35 Effective 2026-03-30 through 2026-04-06
Codeshare flight, operated by American Airlines.(AA 3714)
Daily 16:23 Saint Louis (STL) 1 18:00 Chicago O'Hare (ORD) 3
Finnair AY 4109 Non-stop Embraer EMB 175 (E75) 1:37 Effective 2026-05-21 through 2026-06-05
Codeshare flight, operated by American Airlines.(AA 4513)
Daily 16:23 Saint Louis (STL) 1 18:00 Chicago O'Hare (ORD) 3
Finnair AY 4109 Non-stop Embraer EMB 175 (E75) 1:37 Effective 2026-06-07 through 2026-06-30
Codeshare flight, operated by American Airlines.(AA 4513)
Tue,Thu,Sat 18:15 Saint Louis (STL) 1 19:50 Chicago O'Hare (ORD) 3
Finnair AY 4109 Non-stop Embraer EMB 175 (E75) 1:35 Effective 2026-07-02 through 2026-08-04
Codeshare flight, operated by American Airlines.(AA 4537)
Sat 16:23 Saint Louis (STL) 1 18:00 Chicago O'Hare (ORD) 3
Finnair AY 4199 Non-stop Embraer EMB 175 (E75) 1:37 Operates only on 2026-06-06
Codeshare flight, operated by American Airlines.(AA 4513)
Daily 16:32 Saint Louis (STL) 1 18:00 Chicago O'Hare (ORD) 3
Finnair AY 4199 Non-stop Embraer EMB 175 (E75) 1:28 Effective 2026-10-05 through 2026-10-23
Codeshare flight, operated by American Airlines.(AA 3479)
Tue,Fri 16:32 Saint Louis (STL) 1 18:00 Chicago O'Hare (ORD) 3
Finnair AY 4199 Non-stop Embraer EMB 175 (E75) 1:28 Effective from 2026-10-27
Codeshare flight, operated by American Airlines.(AA 3479)
Daily 18:29 Saint Louis (STL) 1 19:50 Chicago O'Hare (ORD) 3
Finnair AY 4201 Non-stop Canadair CRJ 700 (CR7) 1:21 Effective 2026-05-01 through 2026-05-20
Codeshare flight, operated by American Airlines.(AA 6399)
Wed 16:23 Saint Louis (STL) 1 18:00 Chicago O'Hare (ORD) 3
Finnair AY 4254 Non-stop Embraer EMB 175 (E75) 1:37 Operates only on 2026-07-01
Codeshare flight, operated by American Airlines.(AA 4513)




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Finnair flights from Saint Louis (STL) to Chicago O'Hare (ORD).
Select flight date:
FLIGHT SCHEDULE
Direct Codeshare Flights:
Finnair AY3676
16:18
Saint Louis (STL) 1

17:43
Chicago O'Hare (ORD) 3
Effective 2026-08-05 through 2026-08-14
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 3620)
Duration: 1:25, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Codeshare Flights:
Finnair AY3676
16:18
Saint Louis (STL) 1

17:43
Chicago O'Hare (ORD) 3
Effective 2026-08-16 through 2026-09-01
Mon
-
Tue
Wed
Thu
Fri
Sat
-
Sun
Codeshare flight, operated by American Airlines. (AA 3620)
Duration: 1:25, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Codeshare Flights:
Finnair AY3676
16:18
Saint Louis (STL) 1

17:43
Chicago O'Hare (ORD) 3
Operates only on 2026-09-08
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by American Airlines. (AA 3620)
Duration: 1:25, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Codeshare Flights:
Finnair AY3676
16:29
Saint Louis (STL) 1

18:00
Chicago O'Hare (ORD) 3
Effective 2026-09-09 through 2026-09-27
Mon
-
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines.(AA 4282Z)
Duration: 1:31, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Codeshare Flights:
Finnair AY3676
16:29
Saint Louis (STL) 1

18:00
Chicago O'Hare (ORD) 3
Effective 2026-09-28 through 2026-10-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines.(AA 4282Z)
Duration: 1:31, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Codeshare Flights:
Finnair AY3680
16:18
Saint Louis (STL) 1

17:43
Chicago O'Hare (ORD) 3
Effective 2026-09-02 through 2026-09-06
Mon
-
Tue
-
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 3620)
Duration: 1:25, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Codeshare Flights:
Finnair AY4014
18:29
Saint Louis (STL) 1

19:50
Chicago O'Hare (ORD) 3
Effective 2026-04-08 through 2026-04-29
Mon
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by American Airlines. (AA 6399)
Duration: 1:21, non-stop
Canadair CRJ 700 (CR7)
Direct Codeshare Flights:
Finnair AY4016
18:29
Saint Louis (STL) 1

19:50
Chicago O'Hare (ORD) 3
Effective 2026-04-09 through 2026-04-30
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
Sun
-
Codeshare flight, operated by American Airlines. (AA 6399)
Duration: 1:21, non-stop
Canadair CRJ 700 (CR7)
Direct Codeshare Flights:
Finnair AY4102
18:15
Saint Louis (STL) 1

19:50
Chicago O'Hare (ORD) 3
Effective 2026-07-03 through 2026-08-03
Mon
Tue
-
Wed
Thu
-
Fri
Sat
-
Sun
Codeshare flight, operated by American Airlines. (AA 4537)
Duration: 1:35, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Finnair AY4102
18:33
Saint Louis (STL) 1

20:08
Chicago O'Hare (ORD) 3
Effective 2026-03-29 through 2026-04-05
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Codeshare flight, operated by American Airlines. (AA 3714)
Duration: 1:35, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Finnair AY4102
18:33
Saint Louis (STL) 1

20:08
Chicago O'Hare (ORD) 3
Effective 2026-03-30 through 2026-04-06
Mon
Tue
-
Wed
Thu
Fri
-
Sat
Sun
-
Codeshare flight, operated by American Airlines. (AA 3714)
Duration: 1:35, non-stop
Embraer EMB 170 / EMB 175 (E70)
Direct Codeshare Flights:
Finnair AY4109
16:23
Saint Louis (STL) 1

18:00
Chicago O'Hare (ORD) 3
Effective 2026-05-21 through 2026-06-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 4513)
Duration: 1:37, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Finnair AY4109
16:23
Saint Louis (STL) 1

18:00
Chicago O'Hare (ORD) 3
Effective 2026-06-07 through 2026-06-30
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 4513)
Duration: 1:37, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Finnair AY4109
18:15
Saint Louis (STL) 1

19:50
Chicago O'Hare (ORD) 3
Effective 2026-07-02 through 2026-08-04
Mon
-
Tue
Wed
-
Thu
Fri
-
Sat
Sun
-
Codeshare flight, operated by American Airlines. (AA 4537)
Duration: 1:35, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Finnair AY4199
16:23
Saint Louis (STL) 1

18:00
Chicago O'Hare (ORD) 3
Operates only on 2026-06-06
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Codeshare flight, operated by American Airlines. (AA 4513)
Duration: 1:37, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Finnair AY4199
16:32
Saint Louis (STL) 1

18:00
Chicago O'Hare (ORD) 3
Effective 2026-10-05 through 2026-10-23
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 3479)
Duration: 1:28, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Finnair AY4199
16:32
Saint Louis (STL) 1

18:00
Chicago O'Hare (ORD) 3
Effective from 2026-10-27
Mon
-
Tue
Wed
-
Thu
-
Fri
Sat
-
Sun
-
Codeshare flight, operated by American Airlines. (AA 3479)
Duration: 1:28, non-stop
Embraer EMB 175 (E75)
Direct Codeshare Flights:
Finnair AY4201
18:29
Saint Louis (STL) 1

19:50
Chicago O'Hare (ORD) 3
Effective 2026-05-01 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Codeshare flight, operated by American Airlines. (AA 6399)
Duration: 1:21, non-stop
Canadair CRJ 700 (CR7)
Direct Codeshare Flights:
Finnair AY4254
16:23
Saint Louis (STL) 1

18:00
Chicago O'Hare (ORD) 3
Operates only on 2026-07-01
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Codeshare flight, operated by American Airlines. (AA 4513)
Duration: 1:37, non-stop
Embraer EMB 175 (E75)
  • A domestic route departing from the Saint Louis airport (STL) and arriving at Chicago O'Hare airport (ORD).
  • The flight distance is 258 miles, or 415 km.
  • The timezone of both the departure and the arrival airports is UTC-6 . Current time at both airports is (loading...).
  • For direct flights, the flight time varies between 1:21 and 1:37.
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