United Airlines flight UA 673: Multiple routes

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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Tue 12:40 Washington Dulles (IAD) 14:17 Boston Logan (BOS) B
UA 673 Non-stop Boeing 737-800 (738) 1:37 Operates only on 2026-01-06
Mon-Fri,Sun 12:40 Washington Dulles (IAD) 14:17 Boston Logan (BOS) B
UA 673 Non-stop Boeing 737-900 (739) 1:37 Effective 2026-01-07 through 2026-02-11
Sat 12:40 Washington Dulles (IAD) 14:17 Boston Logan (BOS) B
UA 673 Non-stop Boeing 737-800 (738) 1:37 Effective 2026-01-10 through 2026-02-07
Daily 16:10 Barcelona (BCN) 1 19:20 San Francisco (SFO)
UA 673 Non-stop Boeing 777 (777) 12:10 Effective 2026-05-01 through 2026-09-07
Daily 16:10 Barcelona (BCN) 1 19:25 San Francisco (SFO)
UA 673 Non-stop Boeing 777 (777) 12:15 Effective 2026-09-08 through 2026-10-24
Thu,Sun 17:30 Barcelona (BCN) 1 20:45 San Francisco (SFO)
UA 673 Non-stop Boeing 777 (777) 12:15 Effective 2026-03-01 through 2026-03-05
Mon-Sat 17:35 Denver (DEN) 23:30 Miami (MIA)
UA 673 Non-stop Boeing 737-800 (738) 3:55 Valid until 2026-01-05
Sun 17:35 Denver (DEN) 23:30 Miami (MIA)
UA 673 Non-stop Boeing 737 MAX 9 (7M9) 3:55 Operates only on 2026-01-04
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This flight number is listed as serving the following routes:


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United Airlines flight UA 673: Multiple routes
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Select flight date:
FLIGHT SCHEDULE
Direct Flights:
United Airlines UA673
12:40
Washington Dulles (IAD)

14:17
Boston Logan (BOS) B
Operates only on 2026-01-06
Mon
-
Tue
Wed
-
Thu
-
Fri
-
Sat
-
Sun
-
Duration: 1:37, non-stop
Boeing 737-800 (738)
Direct Flights:
United Airlines UA673
12:40
Washington Dulles (IAD)

14:17
Boston Logan (BOS) B
Effective 2026-01-07 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:37, non-stop
Boeing 737-900 (739)
Direct Flights:
United Airlines UA673
12:40
Washington Dulles (IAD)

14:17
Boston Logan (BOS) B
Effective 2026-01-10 through 2026-02-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:37, non-stop
Boeing 737-800 (738)
Direct Flights:
United Airlines UA673
16:10
Barcelona (BCN) 1

19:20
San Francisco (SFO)
Effective 2026-05-01 through 2026-09-07
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 12:10, non-stop
Boeing 777 (777)
Direct Flights:
United Airlines UA673
16:10
Barcelona (BCN) 1

19:25
San Francisco (SFO)
Effective 2026-09-08 through 2026-10-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 12:15, non-stop
Boeing 777 (777)
Direct Flights:
United Airlines UA673
17:30
Barcelona (BCN) 1

20:45
San Francisco (SFO)
Effective 2026-03-01 through 2026-03-05
Mon
-
Tue
-
Wed
-
Thu
Fri
-
Sat
-
Sun
Duration: 12:15, non-stop
Boeing 777 (777)
Direct Flights:
United Airlines UA673
17:35
Denver (DEN)

23:30
Miami (MIA)
Valid until 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
-
Duration: 3:55, non-stop
Boeing 737-800 (738)
Direct Flights:
United Airlines UA673
17:35
Denver (DEN)

23:30
Miami (MIA)
Operates only on 2026-01-04
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 3:55, non-stop
Boeing 737 MAX 9 (7M9)
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This flight number is listed as serving the following routes:
  • Barcelona (BCN) - San Francisco (SFO)
  • Denver (DEN) - Miami (MIA)
  • Washington Dulles (IAD) - Boston Logan (BOS)
All United Airlines flights
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