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United Airlines

UAL521 / UA521

ICAO: UAL521 IATA: UA521

Flight schedule

Select flight date
Departure
Arrive
Aircraft
Effective
Avalibility
United Airlines
UAL521
Duration
4h 04m
Distance
1603 mi, 2579 km
Coreshare
NZ 6393
Same day flight
Yes
Terminal
Departure: TC Arrival: TB
Meals
Meal (none specific)
Seats
179
First class
20
Economy
159
United Airlines
UAL521
Duration
4h 04m
Distance
1603 mi, 2579 km
Coreshare
NZ 6393
Same day flight
Yes
Terminal
Departure: TC Arrival: TB
Meals
Meal (none specific)
Seats
179
First class
20
Economy
159
United Airlines
UAL521
Duration
4h 30m
Distance
1674 mi, 2693 km
Coreshare
Same day flight
Yes
Terminal
Arrival: TC
Meals
Meal (none specific)
Seats
126
First class
12
Economy
114
United Airlines
UAL521
Duration
4h 04m
Distance
1603 mi, 2579 km
Coreshare
NZ 6393
Same day flight
Yes
Terminal
Departure: TC Arrival: TB
Meals
Meal (none specific)
Seats
179
First class
20
Economy
159
United Airlines
UAL521
Duration
4h 04m
Distance
1603 mi, 2579 km
Coreshare
NZ 6393
Same day flight
Yes
Terminal
Departure: TC Arrival: TB
Meals
Meal (none specific)
Seats
179
First class
20
Economy
159
United Airlines
UAL521
Duration
2h 28m
Distance
856 mi, 1377 km
Coreshare
AD 7003 /NZ 6711
Same day flight
Yes
Terminal
Departure: TC Arrival: TB
Meals
Snack or brunch
Seats
166
First class
16
Economy
150
United Airlines
UAL521
Duration
2h 15m
Distance
691 mi, 1112 km
Coreshare
EK 6006 /NZ 6337
Same day flight
Yes
Terminal
Departure: TN Arrival: TC
Meals
Snack or brunch
Seats
150
First class
12
Economy
138
United Airlines
UAL521
Duration
3h 49m
Distance
1603 mi, 2579 km
Coreshare
NZ 6393
Same day flight
Yes
Terminal
Departure: TC Arrival: TB
Meals
Meal (none specific)
Seats
166
First class
16
Economy
150
United Airlines
UAL521
Duration
3h 49m
Distance
1603 mi, 2579 km
Coreshare
EK 6091 /NZ 6393
Same day flight
Yes
Terminal
Departure: TC Arrival: TB
Meals
Meal (none specific)
Seats
166
First class
16
Economy
150
United Airlines
UAL521
Duration
2h 15m
Distance
691 mi, 1112 km
Coreshare
NZ 6337
Same day flight
Yes
Terminal
Departure: TN Arrival: TC
Meals
Snack or brunch
Seats
150
First class
12
Economy
138
United Airlines
UAL521
Duration
2h 15m
Distance
691 mi, 1112 km
Coreshare
EK 6006 /NZ 6337
Same day flight
Yes
Terminal
Departure: TN Arrival: TC
Meals
Snack or brunch
Seats
126
First class
12
Economy
114
United Airlines
UAL521
Duration
3h 45m
Distance
1603 mi, 2579 km
Coreshare
EK 6091 /NZ 6393
Same day flight
Yes
Terminal
Departure: TC Arrival: TB
Meals
Meal (none specific)
Seats
167
First class
8
Economy
159
United Airlines
UAL521
Duration
3h 51m
Distance
1603 mi, 2579 km
Coreshare
EK 6091 /NZ 6393
Same day flight
Yes
Terminal
Departure: TC Arrival: TB
Meals
Meal (none specific)
Seats
126
First class
12
Economy
114
United Airlines
UAL521
Duration
2h 15m
Distance
691 mi, 1112 km
Coreshare
EK 6006 /NZ 6337
Same day flight
Yes
Terminal
Departure: TN Arrival: TC
Meals
Snack or brunch
Seats
126
First class
12
Economy
114
United Airlines
UAL521
Duration
3h 45m
Distance
1603 mi, 2579 km
Coreshare
EK 6091 /NZ 6393
Same day flight
Yes
Terminal
Departure: TC Arrival: TB
Meals
Meal (none specific)
Seats
167
First class
8
Economy
159
United Airlines
UAL521
Duration
2h 15m
Distance
691 mi, 1112 km
Coreshare
EK 6006 /NZ 6337
Same day flight
Yes
Terminal
Departure: TN Arrival: TC
Meals
Snack or brunch
Seats
126
First class
12
Economy
114
United Airlines
UAL521
Duration
3h 45m
Distance
1603 mi, 2579 km
Coreshare
NZ 6393
Same day flight
Yes
Terminal
Departure: TC Arrival: TB
Meals
Meal (none specific)
Seats
167
First class
8
Economy
159
United Airlines
UAL521
Duration
2h 15m
Distance
691 mi, 1112 km
Coreshare
Same day flight
Yes
Terminal
Departure: TN Arrival: TC
Meals
Snack or brunch
Seats
126
First class
12
Economy
114
United Airlines
UAL521
Duration
3h 45m
Distance
1603 mi, 2579 km
Coreshare
Same day flight
Yes
Terminal
Departure: TC Arrival: TB
Meals
Meal (none specific)
Seats
167
First class
8
Economy
159
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General route info

Frequency:

Daily

Sun Mon Tue Wed Thu Fri Sat

Direct distance

687 miles, 1106 km

Actual distance

691 miles, 1112 km

0.58%
Flight time

2h 15m

Flights / Week

34 flights

Seats / Week

150 seats/flight

5100 seats/week

Upcoming scheduled flights in the coming 30 days

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  • Date
    Time
    From
    To
    Aircraft
    Status
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    21 Jul 2026
    18:26
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    22 Jul 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    23 Jul 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    24 Jul 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    25 Jul 2026
    15:30
    Portland(PWM)
    Houston(IAH)
    Airbus A319
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    26 Jul 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    27 Jul 2026
    18:26
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    28 Jul 2026
    18:26
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    29 Jul 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    30 Jul 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    31 Jul 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    01 Aug 2026
    15:30
    Portland(PWM)
    Houston(IAH)
    Airbus A319
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    02 Aug 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    03 Aug 2026
    18:26
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    04 Aug 2026
    18:26
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    05 Aug 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    06 Aug 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    07 Aug 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    08 Aug 2026
    15:30
    Portland(PWM)
    Houston(IAH)
    Airbus A319
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    09 Aug 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    10 Aug 2026
    18:26
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    11 Aug 2026
    18:34
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    12 Aug 2026
    18:34
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    13 Aug 2026
    18:34
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    14 Aug 2026
    18:34
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    15 Aug 2026
    18:34
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    16 Aug 2026
    18:34
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    17 Aug 2026
    18:34
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    18 Aug 2026
    18:34
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    19 Aug 2026
    18:34
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    20 Aug 2026
    18:34
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521

UAL521 information

A domestic route in USA departing from Atlanta (ATL) and arriving at Houston (IAH).

The timezone of the departure airport is UTC -4, and the timezone of the arrival airport is UTC -5.

The current time at the point of departure is 9:40am, and 8:40am at the point of arrival. There is a -1 hour time difference between the airports.

The flight distance is 691 miles, or 1112 km.

For direct flights, the flight time is about 2:15.

Other flights between Houston and Boston with United
07:30
UA 1977
→
09:33
UA 2227
→
09:40
UA 800
→
09:50
UA 2256
→
09:50
UA 2393
→
12:25
UA 1226
→
12:30
UA 1957
→
16:40
UA 2161
→
16:45
UA 462
→
16:48
UA 2296
→
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