LH421 Lufthansa - Flight Status
Codeshare Flights
The flight UA8858 from United Airlines (UA) is a codeshare flight operated by Lufthansa (LH) under the flight number LH421. Check this page for details about flight LH421.
Below, you can find details about Lufthansa flight LH421, which currently operates between the airports of Boston - Boston Logan International Airport (Airport Code BOS) and Frankfurt - Frankfurt Airport (Airport Code FRA).
This flight data pertains specifically to the flight's details for Monday, August 18, 2025.
Table of contents:
Flight Status Codeshare Flights Additional Information Alternative Flights Punctuality and delays Last Past Flights LH421
Flight Status Codeshare Flights Additional Information Alternative Flights Punctuality and delays Last Past Flights LH421
LH421 On Time performance:
77
We have calculated the percentage of flights that arrived within 15 minutes of their scheduled time, or earlier, based on real flight data from the last 3 months. More about punctuality and delays Flight Status
LH421 Lufthansa to Frankfurt
Scheduled
Flight Status for Monday August 18, 2025
This flight was also scheduled for Yesterday (August 16, 2025). See it here
This flight is also scheduled for Today (August 17, 2025). See it here
Scheduled
Flight Status for Monday August 18, 2025
Departure
Boston (BOS)
August 18, 2025
Boston Logan International Airport
Scheduled Departure Time:
10:00 pm
Terminal:
E
Gate:
-
Scheduled Departure Time: 10:00 pm
Arrival
Frankfurt (FRA)
August 19, 2025
Frankfurt Airport
Scheduled Arrival Time:
11:20 am
Terminal:
1
Gate:
-
Scheduled Arrival Time: 11:20 am
Disclaimer
The information displayed on this website is gathered from third-party providers with a wide reputation on the sector, which in turn obtain the information from the airlines. This data is provided only for informative purposes. www.boston-airport.com assumes no responsibility for loss or damage as a result of relying on information posted here. Please contact your airline to verify flight status.
Codeshare Flights
This flight is shared with other airlines, this means that these other flights are the same:
- AC9094 - Air Canada
- SN7237 - Brussels Airlines
- TG7745 - Thai Airways International
- UA8858 - United Airlines
Additional Information
Which is the frequency of flight LH421?
The flight LH421 is scheduled to flight on daily basis.
Which is the distance of flight LH421?
The distance between the two airports is 3661 miles.
Which is the flight time of flight LH421?
The scheduled flight time gate to gate is: 07:20 hours.
The real flight time gate to gate on average is: 07:23 hours.
Are the departure airport and arrival airport at the same Time Zone?
No, each airport is in a different timezone. The times shown above, are presented in the local time of each respective airport.
Current Time in Boston: 2025-08-17 13:06:57
Current Time in Frankfurt: 2025-08-17 19:06:57
The flight LH421 is scheduled to flight on daily basis.
Which is the distance of flight LH421?
The distance between the two airports is 3661 miles.
Which is the flight time of flight LH421?
The scheduled flight time gate to gate is: 07:20 hours.
The real flight time gate to gate on average is: 07:23 hours.
Are the departure airport and arrival airport at the same Time Zone?
No, each airport is in a different timezone. The times shown above, are presented in the local time of each respective airport.
Current Time in Boston: 2025-08-17 13:06:57
Current Time in Frankfurt: 2025-08-17 19:06:57
Alternative Flights
Punctuality and delays
We have gathered data from recent months and present below an analysis of how timely the flights have been.
Delays analyzed by Weekday: We have gathered available data from last six months, spanning from May 01, 2025 to August 14, 2025. Next, you can observe the results broken down by day of the week: number of flights analyzed, on-time performance per day, and average delay per day.
Delays analyzed by Month: We have gathered available data from last twelve closed months, spanning from August 02, 2024 to July 31, 2025. Next, you can observe the results broken down by month: number of flights analyzed, on-time performance per month, and average delay per month.
In terms of On-Time Performance, by analyzing the flight data from the last three months, spanning from May 15, 2025 to August 14, 2025, we have obtained these figures.
Total number of flights: 92
On Time: 71 ( 77 % )
Moderate Delay: 12 ( 13 % )
Significant Delay: 7 ( 8 % )
Major Delay: 2 ( 2 % )
Canceled: 0 ( 0 % )
Diverted: 0 ( 0 % )
Average Delay: 10 minutes.
Total number of flights: 92
On Time: 71 ( 77 % )
Moderate Delay: 12 ( 13 % )
Significant Delay: 7 ( 8 % )
Major Delay: 2 ( 2 % )
Canceled: 0 ( 0 % )
Diverted: 0 ( 0 % )
Average Delay: 10 minutes.
Last Past Flights LH421
Date
Departure
Arrival
Duration
Aircraft
Status
Sunday
17 August
17 August
09:52 pm
Boston (BOS)
Boston (BOS)
11:13 am
Frankfurt (FRA)
Frankfurt (FRA)
07h 21min
Airbus A340-30
Airbus A340-30
Landed - On-time
Saturday
16 August
16 August
10:22 pm
Boston (BOS)
Boston (BOS)
11:45 am
Frankfurt (FRA)
Frankfurt (FRA)
07h 23min
Airbus A340-30
Airbus A340-30
Landed - Delayed
Friday
15 August
15 August
10:38 pm
Boston (BOS)
Boston (BOS)
12:06 pm
Frankfurt (FRA)
Frankfurt (FRA)
07h 28min
Airbus A340-30
Airbus A340-30
Landed - Delayed
Thursday
14 August
14 August
10:00 pm
Boston (BOS)
Boston (BOS)
11:26 am
Frankfurt (FRA)
Frankfurt (FRA)
07h 26min
Airbus A340-30
Airbus A340-30
Landed - On-time
Wednesday
13 August
13 August
09:42 pm
Boston (BOS)
Boston (BOS)
11:06 am
Frankfurt (FRA)
Frankfurt (FRA)
07h 24min
Airbus A340-30
Airbus A340-30
Landed - On-time
Tuesday
12 August
12 August
10:02 pm
Boston (BOS)
Boston (BOS)
11:18 am
Frankfurt (FRA)
Frankfurt (FRA)
07h 16min
Airbus A340-30
Airbus A340-30
Landed - On-time
Monday
11 August
11 August
10:03 pm
Boston (BOS)
Boston (BOS)
11:29 am
Frankfurt (FRA)
Frankfurt (FRA)
07h 26min
Airbus A340-30
Airbus A340-30
Landed - On-time
Sunday
10 August
10 August
10:03 pm
Boston (BOS)
Boston (BOS)
11:18 am
Frankfurt (FRA)
Frankfurt (FRA)
07h 15min
Airbus A340-30
Airbus A340-30
Landed - On-time
Saturday
09 August
09 August
10:14 pm
Boston (BOS)
Boston (BOS)
11:12 am
Frankfurt (FRA)
Frankfurt (FRA)
06h 58min
Airbus A340-30
Airbus A340-30
Landed - On-time
Friday
08 August
08 August
10:18 pm
Boston (BOS)
Boston (BOS)
11:32 am
Frankfurt (FRA)
Frankfurt (FRA)
07h 14min
Airbus A340-30
Airbus A340-30
Landed - On-time