September is by far the best month, wherein you can get cheapest flights for Boston to Kathmandu. Meanwhile, is perceived as the expensive month due to the varying factors. That’s why it’s highly advised to make advanced online flight booking to save huge amounts of money.
Disclaimer - All the mentioned fares were found within last 48 hrs. The displayed fares are based on historical data and are subject to change. The fares cannot be guaranteed at the time of booking.
BOS
22:00
Boston General Edward Lawrence Logan International Airport
Tue , 02 Sep 2025
KTM
08:50
Kathmandu Tribhuvan International Airport
Thu, 04 Sep 2025
BOS
22:00
Boston General Edward Lawrence Logan International Airport
Thu , 04 Sep 2025
KTM
08:50
Kathmandu Tribhuvan International Airport
Sat, 06 Sep 2025
BOS
21:35
Boston General Edward Lawrence Logan International Airport
Wed , 17 Sep 2025
KTM
06:15
Kathmandu Tribhuvan International Airport
Fri, 19 Sep 2025
BOS
23:05
Boston General Edward Lawrence Logan International Airport
Thu , 04 Sep 2025
KTM
09:45
Kathmandu Tribhuvan International Airport
Sat, 06 Sep 2025
BOS
22:00
Boston General Edward Lawrence Logan International Airport
Sat , 06 Sep 2025
KTM
08:50
Kathmandu Tribhuvan International Airport
Mon, 08 Sep 2025
BOS
21:35
Boston General Edward Lawrence Logan International Airport
Sun , 14 Sep 2025
KTM
06:15
Kathmandu Tribhuvan International Airport
Tue, 16 Sep 2025
BOS
16:30
Boston General Edward Lawrence Logan International Airport
Sat , 06 Sep 2025
KTM
15:40
Kathmandu Tribhuvan International Airport
Mon, 08 Sep 2025
BOS
16:30
Boston General Edward Lawrence Logan International Airport
Thu , 11 Sep 2025
KTM
15:40
Kathmandu Tribhuvan International Airport
Sat, 13 Sep 2025
BOS
16:30
Boston General Edward Lawrence Logan International Airport
Thu , 04 Sep 2025
KTM
15:40
Kathmandu Tribhuvan International Airport
Sat, 06 Sep 2025
BOS
23:05
Boston General Edward Lawrence Logan International Airport
Tue , 02 Sep 2025
KTM
09:45
Kathmandu Tribhuvan International Airport
Thu, 04 Sep 2025
BOS
23:05
Boston General Edward Lawrence Logan International Airport
Thu , 11 Sep 2025
KTM
09:45
Kathmandu Tribhuvan International Airport
Sat, 13 Sep 2025