| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| UDA (Undara Airport) | airport | -18.20 | 144.60 | 0 | |||
| UDAIPUR | airport | India | 24.62 | 73.90 | 1684 | 0 | |
| UDAIRI AAF | airport | Kuwait | 29.70 | 47.44 | 430 | 0 | |
| UDBINA | airport | Croatia | 44.56 | 15.77 | 2462 | 0 | |
| UDD (BERMUDA DUNES) | airport | United States | 33.75 | -116.27 | 73 | 0 | |
| UDE (VOLKEL) | airport | Netherlands | 51.66 | 5.71 | 72 | 0 | |
| UDHAILIYAH | airport | Saudi Arabia | 25.15 | 49.33 | 759 | 0 | |
| UDHAMPUR | airport | India | 32.90 | 75.16 | 2066 | 0 | |
| UDI (TEN CEL AV CESAR BOMBONATO) | airport | Brazil | -18.88 | -48.23 | 3094 | 0 | |
| UDJ (UZHHOROD INTL) | airport | Ukraine | 48.63 | 22.26 | 383 | 0 | |
| UDLS (STEPANAVAN) | airport | Armenia | 41.05 | 44.34 | 4836 | 0 | |
| UDN (Udine-Campoformido Air Base) | airport | 46.03 | 13.19 | 305 | 0 | ||
| UDON THANI | airport | Thailand | 17.39 | 102.79 | 579 | 0 | |
| UDR (UDAIPUR) | airport | India | 24.62 | 73.90 | 1684 | 0 | |
| UDSG (GYUMRI) | airport | Armenia | 40.75 | 43.86 | 5000 | 0 | |
| UDYE (EREBUNI) | airport | Armenia | 40.12 | 44.46 | 2948 | 0 | |
| UDYZ (ZVARTNOTS) | airport | Armenia | 40.15 | 44.40 | 2838 | 0 |