United Airlines flight UA 688: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Daily 08:00 Los Angeles (LAX) 7 16:09 Dulles, Washington (IAD)
UA 688 Non-stop Boeing 757-300 (753) 5:09 Effective 2025-09-25 through 2025-10-25
Mon-Fri,Sun 08:15 Los Angeles (LAX) 7 16:21 Dulles, Washington (IAD)
UA 688 Non-stop Boeing 757-300 (753) 5:06 Effective 2025-06-26 through 2025-08-18
Daily 08:15 Los Angeles (LAX) 7 16:12 Dulles, Washington (IAD)
UA 688 Non-stop Boeing 777 (777) 4:57 Effective 2025-08-19 through 2025-09-24
Sat 08:19 Los Angeles (LAX) 7 16:30 Dulles, Washington (IAD)
UA 688 Non-stop Boeing 737-900 (739) 5:11 Effective 2025-06-28 through 2025-08-16
Daily 08:40 Los Angeles (LAX) 7 16:13 Dulles, Washington (IAD)
UA 688 Non-stop Boeing 777 (777) 4:33 Effective from 2025-10-26
Daily 13:52 Orlando (MCO) B 16:11 Dulles, Washington (IAD)
UA 688 Non-stop Boeing 737-900 (739) 2:19 Effective 2025-05-22 through 2025-06-02
Tue,Wed 13:52 Orlando (MCO) B 16:11 Dulles, Washington (IAD)
UA 688 Non-stop Boeing 737-800 (738) 2:19 Effective 2025-06-03 through 2025-06-25
Mon,Thu-Sun 13:52 Orlando (MCO) B 16:11 Dulles, Washington (IAD)
UA 688 Non-stop Boeing 737-900 (739) 2:19 Effective 2025-06-05 through 2025-06-15
Mon 13:52 Orlando (MCO) B 16:11 Dulles, Washington (IAD)
UA 688 Non-stop Boeing 737 MAX 8 (7M8) 2:19 Operates only on 2025-06-16
Mon,Thu-Sun 13:52 Orlando (MCO) B 16:11 Dulles, Washington (IAD)
UA 688 Non-stop Boeing 737-900 (739) 2:19 Effective 2025-06-19 through 2025-06-23
Thu 17:10 Dulles, Washington (IAD) 18:56 Boston Logan (BOS) B
UA 688 Non-stop Boeing 737-900 (739) 1:46 Operates only on 2025-06-26
Daily 17:10 Dulles, Washington (IAD) 18:56 Boston Logan (BOS) B
UA 688 Non-stop Boeing 737 MAX 9 (7M9) 1:46 Effective 2025-06-27 through 2025-08-18
Daily 17:10 Dulles, Washington (IAD) 18:44 Boston Logan (BOS) B
UA 688 Non-stop Boeing 737 MAX 9 (7M9) 1:34 Effective 2025-08-19 through 2025-09-24
Daily 17:10 Dulles, Washington (IAD) 18:44 Boston Logan (BOS) B
UA 688 Non-stop Boeing 737-900 (739) 1:34 Effective from 2025-10-26
Daily 17:16 Dulles, Washington (IAD) 18:55 Boston Logan (BOS) B
UA 688 Non-stop Boeing 737 MAX 9 (7M9) 1:39 Effective 2025-09-25 through 2025-10-25
Daily 17:33 Dulles, Washington (IAD) 19:20 Boston Logan (BOS) B
UA 688 Non-stop Boeing 737-800 (738) 1:47 Effective 2025-05-22 through 2025-06-25
Daily 17:50 Dulles, Washington (IAD) 19:32 Boston Logan (BOS) B
UA 688 Non-stop Boeing 737-900 (739) 1:42 Valid until 2025-05-21
Thu 20:02 Boston Logan (BOS) B 21:29 Newark Liberty, New York (EWR) C
UA 688 Non-stop Boeing 737-900 (739) 1:27 Operates only on 2025-06-26
Daily 20:02 Boston Logan (BOS) B 21:29 Newark Liberty, New York (EWR) C
UA 688 Non-stop Boeing 737 MAX 9 (7M9) 1:27 Effective 2025-06-27 through 2025-07-03
Daily 20:02 Boston Logan (BOS) B 21:29 Newark Liberty, New York (EWR) C
UA 688 Non-stop Boeing 737 MAX 9 (7M9) 1:27 Effective 2025-07-05 through 2025-07-31
Mon,Wed-Fri,Sun 20:25 Boston Logan (BOS) B 23:11 Denver (DEN)
UA 688 Non-stop Boeing 737-800 (738) 4:46 Valid until 2025-05-19
Wed 20:25 Boston Logan (BOS) B 23:11 Denver (DEN)
UA 688 Non-stop Boeing 737 MAX 9 (7M9) 4:46 Operates only on 2025-05-21
Non-Direct Flights:
Daily 08:00 Los Angeles (LAX) 7 18:55 Boston Logan (BOS) B
UA 688 1-stop Boeing 757-300 (753) 7:55 Effective 2025-09-25 through 2025-10-25
Mon-Fri,Sun 08:15 Los Angeles (LAX) 7 18:56 Boston Logan (BOS) B
UA 688 1-stop Boeing 757-300 (753) 7:41 Effective 2025-06-26 through 2025-08-18
Daily 08:15 Los Angeles (LAX) 7 18:44 Boston Logan (BOS) B
UA 688 1-stop Boeing 777 (777) 7:29 Effective 2025-08-19 through 2025-09-24
Sat 08:19 Los Angeles (LAX) 7 18:56 Boston Logan (BOS) B
UA 688 1-stop Boeing 737-900 (739) 7:37 Effective 2025-06-28 through 2025-08-16
Daily 08:40 Los Angeles (LAX) 7 18:44 Boston Logan (BOS) B
UA 688 1-stop Boeing 777 (777) 7:04 Effective from 2025-10-26
Daily 13:52 Orlando (MCO) B 19:20 Boston Logan (BOS) B
UA 688 1-stop Boeing 737-900 (739) 5:28 Effective 2025-05-22 through 2025-06-02
Tue,Wed 13:52 Orlando (MCO) B 19:20 Boston Logan (BOS) B
UA 688 1-stop Boeing 737-800 (738) 5:28 Effective 2025-06-03 through 2025-06-25
Mon,Thu-Sun 13:52 Orlando (MCO) B 19:20 Boston Logan (BOS) B
UA 688 1-stop Boeing 737-900 (739) 5:28 Effective 2025-06-05 through 2025-06-15
Mon 13:52 Orlando (MCO) B 19:20 Boston Logan (BOS) B
UA 688 1-stop Boeing 737 MAX 8 (7M8) 5:28 Operates only on 2025-06-16
Mon,Thu-Sun 13:52 Orlando (MCO) B 19:20 Boston Logan (BOS) B
UA 688 1-stop Boeing 737-900 (739) 5:28 Effective 2025-06-19 through 2025-06-23
Thu 17:10 Dulles, Washington (IAD) 21:29 Newark Liberty, New York (EWR) C
UA 688 1-stop Boeing 737-900 (739) 4:19 Operates only on 2025-06-26
Daily 17:10 Dulles, Washington (IAD) 21:29 Newark Liberty, New York (EWR) C
UA 688 1-stop Boeing 737 MAX 9 (7M9) 4:19 Effective 2025-06-27 through 2025-07-03
Daily 17:10 Dulles, Washington (IAD) 21:29 Newark Liberty, New York (EWR) C
UA 688 1-stop Boeing 737 MAX 9 (7M9) 4:19 Effective 2025-07-05 through 2025-07-31
Mon,Wed-Fri,Sun 17:50 Dulles, Washington (IAD) 23:11 Denver (DEN)
UA 688 1-stop Boeing 737-900 (739) 7:21 Valid until 2025-05-21
Mon-Fri,Sun 08:15 Los Angeles (LAX) 7 21:29 Newark Liberty, New York (EWR) C
UA 688 2-stop Boeing 757-300 (753) 10:14 Effective 2025-06-26 through 2025-07-03
Mon-Fri,Sun 08:15 Los Angeles (LAX) 7 21:29 Newark Liberty, New York (EWR) C
UA 688 2-stop Boeing 757-300 (753) 10:14 Effective 2025-07-06 through 2025-07-31
Sat 08:19 Los Angeles (LAX) 7 21:29 Newark Liberty, New York (EWR) C
UA 688 2-stop Boeing 737-900 (739) 10:10 Effective 2025-06-28 through 2025-07-26
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This flight number is listed as serving the following routes:


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United Airlines flight UA 688: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
United Airlines UA688
08:00
Los Angeles (LAX) 7

16:09
Dulles, Washington (IAD)
Effective 2025-09-25 through 2025-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:09, non-stop
Boeing 757-300 (753)
United Airlines UA688
08:15
Los Angeles (LAX) 7

16:21
Dulles, Washington (IAD)
Effective 2025-06-26 through 2025-08-18
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 5:06, non-stop
Boeing 757-300 (753)
United Airlines UA688
08:15
Los Angeles (LAX) 7

16:12
Dulles, Washington (IAD)
Effective 2025-08-19 through 2025-09-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:57, non-stop
Boeing 777 (777)
United Airlines UA688
08:19
Los Angeles (LAX) 7

16:30
Dulles, Washington (IAD)
Effective 2025-06-28 through 2025-08-16
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 5:11, non-stop
Boeing 737-900 (739)
United Airlines UA688
08:40
Los Angeles (LAX) 7

16:13
Dulles, Washington (IAD)
Effective from 2025-10-26
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:33, non-stop
Boeing 777 (777)
United Airlines UA688
13:52
Orlando (MCO) B

16:11
Dulles, Washington (IAD)
Effective 2025-05-22 through 2025-06-02
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:19, non-stop
Boeing 737-900 (739)
United Airlines UA688
13:52
Orlando (MCO) B

16:11
Dulles, Washington (IAD)
Effective 2025-06-03 through 2025-06-25
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:19, non-stop
Boeing 737-800 (738)
United Airlines UA688
13:52
Orlando (MCO) B

16:11
Dulles, Washington (IAD)
Effective 2025-06-05 through 2025-06-15
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
Duration: 2:19, non-stop
Boeing 737-900 (739)
United Airlines UA688
13:52
Orlando (MCO) B

16:11
Dulles, Washington (IAD)
Operates only on 2025-06-16
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 2:19, non-stop
Boeing 737 MAX 8 (7M8)
United Airlines UA688
13:52
Orlando (MCO) B

16:11
Dulles, Washington (IAD)
Effective 2025-06-19 through 2025-06-23
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
Duration: 2:19, non-stop
Boeing 737-900 (739)
United Airlines UA688
17:10
Dulles, Washington (IAD)

18:56
Boston Logan (BOS) B
Operates only on 2025-06-26
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:46, non-stop
Boeing 737-900 (739)
United Airlines UA688
17:10
Dulles, Washington (IAD)

18:56
Boston Logan (BOS) B
Effective 2025-06-27 through 2025-08-18
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:46, non-stop
Boeing 737 MAX 9 (7M9)
United Airlines UA688
17:10
Dulles, Washington (IAD)

18:44
Boston Logan (BOS) B
Effective 2025-08-19 through 2025-09-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:34, non-stop
Boeing 737 MAX 9 (7M9)
United Airlines UA688
17:10
Dulles, Washington (IAD)

18:44
Boston Logan (BOS) B
Effective from 2025-10-26
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:34, non-stop
Boeing 737-900 (739)
United Airlines UA688
17:16
Dulles, Washington (IAD)

18:55
Boston Logan (BOS) B
Effective 2025-09-25 through 2025-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:39, non-stop
Boeing 737 MAX 9 (7M9)
United Airlines UA688
17:33
Dulles, Washington (IAD)

19:20
Boston Logan (BOS) B
Effective 2025-05-22 through 2025-06-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:47, non-stop
Boeing 737-800 (738)
United Airlines UA688
17:50
Dulles, Washington (IAD)

19:32
Boston Logan (BOS) B
Valid until 2025-05-21
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:42, non-stop
Boeing 737-900 (739)
United Airlines UA688
20:02
Boston Logan (BOS) B

21:29
Newark Liberty, New York (EWR) C
Operates only on 2025-06-26
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 1:27, non-stop
Boeing 737-900 (739)
United Airlines UA688
20:02
Boston Logan (BOS) B

21:29
Newark Liberty, New York (EWR) C
Effective 2025-06-27 through 2025-07-03
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:27, non-stop
Boeing 737 MAX 9 (7M9)
United Airlines UA688
20:02
Boston Logan (BOS) B

21:29
Newark Liberty, New York (EWR) C
Effective 2025-07-05 through 2025-07-31
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:27, non-stop
Boeing 737 MAX 9 (7M9)
United Airlines UA688
20:25
Boston Logan (BOS) B

23:11
Denver (DEN)
Valid until 2025-05-19
Mon
Tue
-
Wed
Thu
Fri
Sat
-
Sun
Duration: 4:46, non-stop
Boeing 737-800 (738)
United Airlines UA688
20:25
Boston Logan (BOS) B

23:11
Denver (DEN)
Operates only on 2025-05-21
Mon
-
Tue
-
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 4:46, non-stop
Boeing 737 MAX 9 (7M9)
Non-Direct Flights:
United Airlines UA688
08:00
Los Angeles (LAX) 7

18:55
Boston Logan (BOS) B
Effective 2025-09-25 through 2025-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 7:55, 1-stop
Boeing 757-300 (753)
United Airlines UA688
08:15
Los Angeles (LAX) 7

18:56
Boston Logan (BOS) B
Effective 2025-06-26 through 2025-08-18
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 7:41, 1-stop
Boeing 757-300 (753)
United Airlines UA688
08:15
Los Angeles (LAX) 7

18:44
Boston Logan (BOS) B
Effective 2025-08-19 through 2025-09-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 7:29, 1-stop
Boeing 777 (777)
United Airlines UA688
08:19
Los Angeles (LAX) 7

18:56
Boston Logan (BOS) B
Effective 2025-06-28 through 2025-08-16
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 7:37, 1-stop
Boeing 737-900 (739)
United Airlines UA688
08:40
Los Angeles (LAX) 7

18:44
Boston Logan (BOS) B
Effective from 2025-10-26
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 7:04, 1-stop
Boeing 777 (777)
United Airlines UA688
13:52
Orlando (MCO) B

19:20
Boston Logan (BOS) B
Effective 2025-05-22 through 2025-06-02
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 5:28, 1-stop
Boeing 737-900 (739)
United Airlines UA688
13:52
Orlando (MCO) B

19:20
Boston Logan (BOS) B
Effective 2025-06-03 through 2025-06-25
Mon
-
Tue
Wed
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 5:28, 1-stop
Boeing 737-800 (738)
United Airlines UA688
13:52
Orlando (MCO) B

19:20
Boston Logan (BOS) B
Effective 2025-06-05 through 2025-06-15
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
Duration: 5:28, 1-stop
Boeing 737-900 (739)
United Airlines UA688
13:52
Orlando (MCO) B

19:20
Boston Logan (BOS) B
Operates only on 2025-06-16
Mon
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 5:28, 1-stop
Boeing 737 MAX 8 (7M8)
United Airlines UA688
13:52
Orlando (MCO) B

19:20
Boston Logan (BOS) B
Effective 2025-06-19 through 2025-06-23
Mon
Tue
-
Wed
-
Thu
Fri
Sat
Sun
Duration: 5:28, 1-stop
Boeing 737-900 (739)
United Airlines UA688
17:10
Dulles, Washington (IAD)

21:29
Newark Liberty, New York (EWR) C
Operates only on 2025-06-26
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
-
Duration: 4:19, 1-stop
Boeing 737-900 (739)
United Airlines UA688
17:10
Dulles, Washington (IAD)

21:29
Newark Liberty, New York (EWR) C
Effective 2025-06-27 through 2025-07-03
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:19, 1-stop
Boeing 737 MAX 9 (7M9)
United Airlines UA688
17:10
Dulles, Washington (IAD)

21:29
Newark Liberty, New York (EWR) C
Effective 2025-07-05 through 2025-07-31
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 4:19, 1-stop
Boeing 737 MAX 9 (7M9)
United Airlines UA688
17:50
Dulles, Washington (IAD)

23:11
Denver (DEN)
Valid until 2025-05-21
Mon
Tue
-
Wed
Thu
Fri
Sat
-
Sun
Duration: 7:21, 1-stop
Boeing 737-900 (739)
United Airlines UA688
08:15
Los Angeles (LAX) 7

21:29
Newark Liberty, New York (EWR) C
Effective 2025-06-26 through 2025-07-03
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 10:14, 2-stop
Boeing 757-300 (753)
United Airlines UA688
08:15
Los Angeles (LAX) 7

21:29
Newark Liberty, New York (EWR) C
Effective 2025-07-06 through 2025-07-31
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 10:14, 2-stop
Boeing 757-300 (753)
United Airlines UA688
08:19
Los Angeles (LAX) 7

21:29
Newark Liberty, New York (EWR) C
Effective 2025-06-28 through 2025-07-26
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 10:10, 2-stop
Boeing 737-900 (739)
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This flight number is listed as serving the following routes:
  • Boston Logan (BOS) - Denver (DEN)
  • Boston Logan (BOS) - Newark Liberty, New York (EWR)
  • Dulles, Washington (IAD) - Boston Logan (BOS)
  • Dulles, Washington (IAD) - Denver (DEN)
  • Dulles, Washington (IAD) - Newark Liberty, New York (EWR)
  • Los Angeles (LAX) - Boston Logan (BOS)
  • Los Angeles (LAX) - Dulles, Washington (IAD)
  • Los Angeles (LAX) - Newark Liberty, New York (EWR)
  • Orlando (MCO) - Boston Logan (BOS)
  • Orlando (MCO) - Dulles, Washington (IAD)
All United Airlines flights
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