Tribhuvan International offers nonstop service to 40 destinations, served by 32 airlines.
| Destination | Code | Country | Distance | Duration | Airlines |
|---|---|---|---|---|---|
| Kathmandu | KTM | Nepal | 0 km | 1h 0m | U4, N9, YT |
| Simara | SIF | Nepal | 70 km | 0h 15m | U4 |
| Bharatpur | BHR | Nepal | 91 km | 0h 25m | U4 |
| Janakpur | JKR | Nepal | 123 km | 0h 25m | U4, YT |
| Pokhara | PKR | Nepal | 146 km | 0h 25m | U4, YT, N9 |
| Tumling Tar | TMI | Nepal | 187 km | 0h 30m | U4 |
| Rajbiraj | RJB | Nepal | 189 km | 0h 35m | U4 |
| Bhairawa | BWA | Nepal | 192 km | 0h 30m | U4, YT, N9 |
| Biratnagar | BIR | Nepal | 232 km | 0h 40m | U4, YT, N9 |
| Bhadrapur | BDP | Nepal | 299 km | 0h 45m | U4, YT, N9 |
| Varanasi | VNS | India | 352 km | 1h 5m | U4 |
| Nepalganj | KEP | Nepal | 365 km | 0h 50m | U4, YT, N9 |
| Surkhet | SKH | Nepal | 378 km | 0h 55m | U4, N9 |
| Paro | PBH | Bhutan | 402 km | 1h 0m | B3, KB, W2 |
| Dhangarhi | DHI | Nepal | 482 km | 0h 55m | U4, N9 |
| Lhasa/Lasa | LXA | China | 571 km | 1h 20m | H9 |
| Kolkata | CCU | India | 639 km | 1h 45m | U4 |
| Dhaka | DAC | Bangladesh | 662 km | 1h 25m | BG, H9 |
| Delhi | DEL | India | 816 km | 1h 55m | 6E, AI, B3, RA, W2 |
| Mumbai | BOM | India | 1,591 km | 2h 45m | RA, 6E |
| Kunming | KMG | China | 1,775 km | 3h 0m | MU |
| Bengaluru | BLR | India | 1,791 km | 3h 15m | RA, IX |
| Chengdu | TFU | China | 1,879 km | 3h 50m | 3U, CA |
| Bangkok | DMK | Thailand | 2,198 km | 3h 20m | SL, FD |
| Bangkok | BKK | Thailand | 2,226 km | 3h 30m | RA, TG |
| Colombo | CMB | Sri Lanka | 2,344 km | 3h 35m | UL |
| Guangzhou | CAN | China | 2,842 km | 4h 10m | CZ, RA |
| Hong Kong | HKG | Hong Kong SAR | 2,938 km | 4h 30m | RA, CX |
| Sharjah | SHJ | United Arab Emirates | 2,978 km | 4h 25m | G9 |
| Dubai | DXB | United Arab Emirates | 2,995 km | 4h 45m | FZ, H9, RA |
| Abu Dhabi | AUH | United Arab Emirates | 3,086 km | 5h 20m | 3L |
| Kuala Lumpur | KUL | Malaysia | 3,264 km | 4h 45m | H9, MH, OD, RA |
| Doha | DOH | Qatar | 3,364 km | 5h 0m | H9, QR, RA |
| Dammam | DMM | Saudi Arabia | 3,517 km | 5h 33m | H9, RA |
| Singapore | SIN | Singapore | 3,527 km | 5h 0m | SQ |
| Kuwait | KWI | Kuwait | 3,649 km | 5h 58m | J9, H9, KU |
| Riyadh | RUH | Saudi Arabia | 3,855 km | 5h 48m | H9 |
| Seoul | ICN | Republic of Korea | 3,972 km | 6h 5m | KE |
| Tokyo | NRT | Japan | 5,223 km | 6h 45m | RA |
| Istanbul | IST | Turkiye | 5,315 km | 8h 15m | TK |