Informational Guide to Frankfurt am Main Airport (FRA) - NON OFFICIAL

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 Saturday, October 25, 2025.

LH421 On Time performance:
91
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 from Boston

Landed - On-time
Delay: 6 minutes
Flight Status for Saturday October 25, 2025

Airline information

Lufthansa
Lufthansa
Equipment: Airbus A340-300

Departure

Boston (BOS)
October 24, 2025
Boston Logan International Airport
Departed at:
22:09
Terminal:
E
Gate:
E9
Scheduled Departure Time: 22:00

Arrival

Frankfurt (FRA)
October 25, 2025
Frankfurt Airport
Arrived at:
11:26
Terminal:
1
Gate:
B25
Scheduled Arrival Time: 11:20
Baggage: 14
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.airport-fra.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 5891 kilometers.

Which is the flight time of flight LH421?
The scheduled flight time gate to gate is: 08:20 hours.
The real flight time gate to gate on average is: 08:11 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: 2025-10-26 16:30:52
Current Time in Frankfurt: 2025-10-26 21:30:52

Alternative Flights

The following airlines serves the same route between Boston and Frankfurt:

Condor
- Flight Number: DE2039. (On Time performance: 79 - Average Delay: 11 minutes)

Lufthansa
- Flight Number: LH423. (On Time performance: 78 - Average Delay: 14 minutes)

Punctuality and delays

We have gathered data from recent months and present below an analysis of how timely the flights have been.

In terms of On-Time Performance, by analyzing the flight data from the last three months, spanning from July 24, 2025 to October 23, 2025, we have obtained these figures.
Total number of flights: 92
On Time: 84 ( 91 % )
Moderate Delay: 5 ( 5 % )
Significant Delay: 3 ( 3 % )
Major Delay: 0 ( 0 % )
Canceled: 0 ( 0 % )
Diverted: 0 ( 0 % )

Average Delay: 4 minutes.
Delays analyzed by Weekday: We have gathered available data from last six months, spanning from May 02, 2025 to October 23, 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 October 02, 2024 to September 30, 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.

Last Past Flights LH421

Date
Departure
Arrival
Duration
Aircraft
Status
Saturday
25 October
22:09
Boston (BOS)
11:26
Frankfurt (FRA)
08h 17min
Airbus A340-30
Airbus A340-30
Landed - On-time
Friday
24 October
22:20
Boston (BOS)
11:29
Frankfurt (FRA)
08h 09min
Airbus A340-30
Airbus A340-30
Landed - On-time
Thursday
23 October
21:56
Boston (BOS)
11:10
Frankfurt (FRA)
08h 14min
Airbus A340-30
Airbus A340-30
Landed - On-time
Wednesday
22 October
21:39
Boston (BOS)
10:54
Frankfurt (FRA)
08h 15min
Airbus A340-30
Airbus A340-30
Landed - On-time
Tuesday
21 October
21:47
Boston (BOS)
11:20
Frankfurt (FRA)
08h 33min
Airbus A340-30
Airbus A340-30
Landed - On-time
Monday
20 October
21:46
Boston (BOS)
11:13
Frankfurt (FRA)
08h 27min
Airbus A340-30
Airbus A340-30
Landed - On-time
Sunday
19 October
21:53
Boston (BOS)
11:06
Frankfurt (FRA)
08h 13min
Airbus A340-30
Airbus A340-30
Landed - On-time
Saturday
18 October
21:54
Boston (BOS)
11:08
Frankfurt (FRA)
08h 14min
Airbus A340-30
Airbus A340-30
Landed - On-time
Friday
17 October
21:58
Boston (BOS)
11:24
Frankfurt (FRA)
08h 26min
Airbus A340-30
Airbus A340-30
Landed - On-time
Thursday
16 October
21:55
Boston (BOS)
11:16
Frankfurt (FRA)
08h 21min
Airbus A340-30
Airbus A340-30
Landed - On-time