| FLIGHT SCHEDULE | 
|---|
| Direct Codeshare Flights: | 
| Wed,Sun 
14:35 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A319 (319) 2:15 Effective 2025-10-26 through 2025-12-21 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Mon,Thu,Fri 
14:35 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A321 (321) 2:15 Effective 2025-10-27 through 2025-12-22 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Sat 
14:35 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320 (320) 2:15 Effective from 2025-11-01 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Sun 
14:35 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A319 (319) 2:15 Effective 2025-12-28 through 2026-01-04 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Mon,Fri 
14:35 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A321 (321) 2:15 Effective 2025-12-29 through 2026-01-05 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Wed,Sun 
14:35 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A319 (319) 2:15 Effective from 2026-01-07 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Mon,Thu,Fri 
14:35 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A321 (321) 2:15 Effective from 2026-01-08 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Mon,Thu 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A321 (321) 2:10 Valid until 2025-05-01 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Tue,Fri 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320 (32A) 2:10 Valid until 2025-05-02 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Wed 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320 (320) 2:10 Valid until 2025-05-14 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Mon 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A319 (319) 2:10 Operates only on 2025-05-05 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Mon,Tue,Thu,Fri 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320neo (32N) 2:10 Effective 2025-05-06 through 2025-05-12 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Tue,Thu 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320 (32A) 2:10 Effective 2025-05-13 through 2025-05-15 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Fri 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320neo (32N) 2:10 Effective 2025-05-16 through 2025-05-23 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Tue,Wed 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320 (320) 2:10 Effective 2025-05-20 through 2025-05-21 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Thu 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A321 (321) 2:10 Operates only on 2025-05-22 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Tue,Thu,Fri 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320neo (32N) 2:10 Effective 2025-05-27 through 2025-06-03 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Wed 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320 (320) 2:10 Effective 2025-05-28 through 2025-06-04 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Thu 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A321 (321) 2:10 Operates only on 2025-06-05 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Wed,Fri 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320 (320) 2:10 Effective 2025-06-06 through 2025-06-11 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Mon,Tue,Thu 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320neo (32N) 2:10 Effective 2025-06-09 through 2025-06-12 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Fri 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A321 (321) 2:10 Operates only on 2025-06-13 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Mon 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320 (32A) 2:10 Operates only on 2025-06-16 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Mon,Tue,Thu,Fri 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320neo (32N) 2:10 Effective 2025-06-17 through 2025-06-24 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Wed 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320 (320) 2:10 Effective 2025-06-18 through 2025-06-25 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Thu 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A321 (321) 2:10 Operates only on 2025-06-26 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Fri 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320 (32A) 2:10 Effective 2025-06-27 through 2025-07-04 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Mon-Thu 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320 (320) 2:10 Effective 2025-06-30 through 2025-07-03 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Mon,Thu 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A321 (321) 2:10 Effective 2025-07-07 through 2025-07-31 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Tue,Wed 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320 (320) 2:10 Effective 2025-07-08 through 2025-07-09 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Tue,Fri 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320neo (32N) 2:10 Effective 2025-07-11 through 2025-07-15 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Wed 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320 (320) 2:10 Effective 2025-07-16 through 2025-08-27 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Fri 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A319 (319) 2:10 Effective 2025-07-18 through 2025-07-25 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Tue 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320neo (32N) 2:10 Effective 2025-07-22 through 2025-08-12 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Mon,Thu,Fri 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A321 (321) 2:10 Effective 2025-08-01 through 2025-08-18 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Mon,Tue,Thu,Fri 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A321 (321) 2:10 Effective 2025-08-19 through 2025-08-25 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Tue 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320neo (32N) 2:10 Effective 2025-08-26 through 2025-09-02 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Mon,Wed-Fri 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A321 (321) 2:10 Effective 2025-08-28 through 2025-09-08 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Mon,Tue,Thu 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A321 (321) 2:10 Effective 2025-09-09 through 2025-09-15 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Wed 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320 (320) 2:10 Effective 2025-09-10 through 2025-09-24 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Tue,Fri 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320 (32A) 2:10 Effective 2025-09-12 through 2025-09-16 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Mon,Thu 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A321 (321) 2:10 Effective 2025-09-18 through 2025-09-29 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Tue 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320neo (32N) 2:10 Effective 2025-09-23 through 2025-09-30 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Thu 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320neo (32N) 2:10 Operates only on 2025-10-02 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Mon 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320 (32A) 2:10 Effective 2025-10-06 through 2025-10-13 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Tue,Thu 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A321 (321) 2:10 Effective 2025-10-07 through 2025-10-09 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Wed 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320 (320) 2:10 Effective 2025-10-08 through 2025-10-22 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Fri 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320neo (32N) 2:10 Effective 2025-10-10 through 2025-10-17 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Tue 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320 (32A) 2:10 Operates only on 2025-10-14 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Tue,Thu 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A321 (321) 2:10 Effective 2025-10-16 through 2025-10-23 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Mon 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A320neo (32N) 2:10 Operates only on 2025-10-20 Codeshare flight, operated by Lufthansa.(LH 1428) | 
| Fri 
14:40 
Frankfurt (FRA) 1 
17:50 
Sofia (SOF) 2 UA 9270 Non-stop Airbus A321 (321) 2:10 Operates only on 2025-10-24 Codeshare flight, operated by Lufthansa.(LH 1428) | 
