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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
176
First class
6
Business
9
Economy
161
United Airlines
UAL521
Duration
2h 35m
Distance
899 mi, 1446 km
Coreshare
NH 7328 /NZ 9234
Same day flight
Yes
Terminal
Departure: T3
Meals
Snack or brunch
Seats
126
First class
12
Economy
114
United Airlines
UAL521
Duration
2h 35m
Distance
899 mi, 1446 km
Coreshare
NH 7328 /NZ 9234
Same day flight
Yes
Terminal
Departure: T3
Meals
Snack or brunch
Seats
150
First class
12
Economy
138
United Airlines
UAL521
Duration
2h 35m
Distance
899 mi, 1446 km
Coreshare
AC 4032 /NH 7328 /NZ 9234
Same day flight
Yes
Terminal
Departure: T3
Meals
Snack or brunch
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
176
First class
6
Business
9
Economy
161
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 21m
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
4h 04m
Distance
1603 mi, 2579 km
Coreshare
NZ 6393
Same day flight
Yes
Terminal
Departure: TC Arrival: TB
Meals
Meal (none specific)
Seats
128
First class
8
Economy
120
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
1h 34m
Distance
323 mi, 520 km
Coreshare
AC 3581 /LH 7454
Same day flight
Yes
Terminal
Meals
Snack or brunch
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 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 03m
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
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
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
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
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
TERMINAL C
According to schedule
Live tracker
Svg Vector Icons : http://www.onlinewebfonts.com/icon
IAH
Houston, US
left TERMINAL C
Houston - IAH
MONDAY 25-MAY-2026
18:15 GMT-0500
BOS
Boston, US
arrives TERMINAL B
Boston - BOS
MONDAY 25-MAY-2026
23:19 GMT-0400
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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 21m

Flights / Week

32 flights

Seats / Week

126 seats/flight

4032 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:
    27 May 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737-900 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    28 May 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737-900 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    29 May 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737-900 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    30 May 2026
    16:15
    San Francisco(SFO)
    Albuquerque(ABQ)
    Airbus A319
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    31 May 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737-900 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    03 Jun 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737-900 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    04 Jun 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737-900 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    05 Jun 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737-900 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    06 Jun 2026
    16:15
    San Francisco(SFO)
    Albuquerque(ABQ)
    Airbus A320
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    07 Jun 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737-900 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    10 Jun 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737-900 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    11 Jun 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737-900 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    12 Jun 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737-900 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    13 Jun 2026
    16:15
    San Francisco(SFO)
    Albuquerque(ABQ)
    Airbus A319
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    14 Jun 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737-900 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    17 Jun 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737MAX 9 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    18 Jun 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737-900 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    19 Jun 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737-900 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    21 Jun 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737-900 Passenger
    UA521
  • Date:
    Time:
    From:
    To:
    Aircraft:
    Status:
    24 Jun 2026
    18:15
    Houston(IAH)
    Boston(BOS)
    Boeing 737-900 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 10:57am, and 9:57am 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 2:21.

Other flights between Houston and Boston with United
07:30
UA 1977
→
08:30
UA 2739
→
09:50
UA 2393
→
12:25
UA 1226
→
12:30
UA 1957
→
14:47
UA 462
→
16:40
UA 2161
→
16:55
UA 2296
→
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