| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| UNALAKLEET | airport | United States | 63.89 | -160.80 | 21 | 0 | |
| UNALASKA | airport | United States | 53.90 | -166.54 | 22 | 0 | |
| UNCLE CHUCK'S | airport | United States | 41.92 | -88.79 | 880 | 0 | |
| UNDERLAND AIRSTRIP | airport | United States | 44.15 | -93.27 | 1145 | 0 | |
| UNDERWOOD | airport | United States | 47.47 | -101.13 | 2035 | 0 | |
| UNDLIN AIRSTRIP | airport | United States | 48.69 | -101.35 | 1575 | 0 | |
| UNGER FIELD | airport | United States | 39.36 | -83.42 | 940 | 0 | |
| UNICORN | airport | United States | 30.66 | -90.23 | 147 | 0 | |
| UNICORN PLACE | airport | United States | 30.84 | -86.28 | 260 | 0 | |
| UNIFI | airport | United States | 36.14 | -80.65 | 990 | 0 | |
| UNION CO | airport | United States | 40.22 | -83.35 | 1021 | 0 | |
| UNION COUNTY TROY SHELTON FLD | airport | United States | 34.69 | -81.64 | 610 | 0 | |
| UNION EVA | airport | United States | 33.66 | -118.06 | 79 | 0 | |
| UNION GENERAL HOSPITAL | airport | United States | 34.89 | -83.96 | 1911 | 0 | |
| UNION HOSPITAL | airport | United States | 39.49 | -87.41 | 480 | 0 | |
| UNION HOSPITAL | airport | United States | 40.52 | -81.45 | 926 | 0 | |
| UNION MEDICAL CENTER | airport | United States | 33.21 | -92.67 | 265 | 0 | |
| UNION MEMORIAL HOSPITAL INC | airport | United States | 34.97 | -80.52 | 600 | 0 | |
| UNION MUNI | airport | United States | 32.58 | -89.14 | 512 | 0 | |
| UNION PARISH | airport | United States | 32.72 | -92.34 | 121 | 0 | |
| UNIONTOWN HOSPITAL | airport | United States | 39.90 | -79.74 | 1115 | 0 | |
| UNITED BANK PLAZA | airport | United States | 33.49 | -112.07 | 1100 | 0 | |
| UNITED CA BANK DATA PROCESSING OPS | airport | United States | 34.07 | -118.29 | 367 | 0 | |
| UNITED COAL | airport | United States | 37.30 | -82.13 | 1020 | 0 | |
| UNITED HOSPITAL DISTRICT | airport | United States | 43.63 | -94.10 | 1089 | 0 | |
| UNITED SAMARITANS MEDICAL CENTER | airport | United States | 40.14 | -87.65 | 612 | 0 | |
| UNITED TECHNOLOGY CORP. | airport | United States | 41.77 | -72.67 | 351 | 0 | |
| UNITED TELEPHONE SYSTEM | airport | United States | 45.71 | -121.53 | 100 | 0 | |
| UNITY | airport | United States | 44.45 | -118.19 | 3975 | 0 | |
| UNITY AERODROME | airport | United States | 34.80 | -80.68 | 640 | 0 | |
| UNITY HEALTH CENTER | airport | United States | 35.36 | -96.94 | 1073 | 0 | |
| UNITY HEALTHCARE | airport | United States | 41.43 | -91.05 | 633 | 0 | |
| UNIV OF ILLINOIS WILLARD | airport | United States | 40.04 | -88.28 | 754 | 0 | |
| UNIV OF MEDICINE & DENTISTRY ROOFTOP | airport | United States | 40.74 | -74.19 | 237 | 0 | |
| UNIV OF TENNESSEE LIFESTAR SWEETWATER | airport | United States | 35.61 | -84.46 | 947 | 0 | |
| UNIV OF TENNESSEE MEDICAL CENTER | airport | United States | 35.94 | -83.94 | 924 | 0 | |
| UNIV. OF NE MEDICAL CENTER | airport | United States | 41.25 | -95.98 | 1160 | 0 | |
| UNIVERSAL MINE | airport | United States | 39.61 | -87.46 | 550 | 0 | |
| UNIVERSITY | airport | United States | 38.53 | -121.79 | 69 | 0 | |
| UNIVERSITY | airport | United States | 38.53 | -121.79 | 68 | 0 | |
| UNIVERSITY AIRPARK | airport | United States | 42.84 | -84.48 | 856 | 0 | |
| UNIVERSITY HEALTH SYSTEM | airport | United States | 29.51 | -98.58 | 994 | 0 | |
| UNIVERSITY HOSPITAL | airport | United States | 34.75 | -92.32 | 445 | 0 | |
| UNIVERSITY HOSPITAL | airport | United States | 38.25 | -85.74 | 465 | 0 | |
| UNIVERSITY HOSPITAL | airport | United States | 32.33 | -90.17 | 344 | 0 | |
| UNIVERSITY HOSPITAL | airport | United States | 39.65 | -79.96 | 1120 | 0 | |
| UNIVERSITY HOSPITAL/SICU | airport | United States | 39.14 | -84.50 | 937 | 0 | |
| UNIVERSITY HOSPITALS & CLINICS | airport | United States | 38.94 | -92.33 | 730 | 0 | |
| UNIVERSITY HOSPITALS OF CLEVELAND | airport | United States | 41.51 | -81.60 | 761 | 0 | |
| UNIVERSITY MEDICAL CENTER | airport | United States | 33.91 | -117.20 | 1563 | 0 | |
| UNIVERSITY MEDICAL CENTER | airport | United States | 33.64 | -101.89 | 3231 | 0 | |
| UNIVERSITY MEDICAL CENTER HOSPITAL | airport | United States | 32.24 | -110.95 | 2468 | 0 | |
| UNIVERSITY MEDICAL CENTER-SOUTHERN NEVADA | airport | United States | 36.16 | -115.17 | 2096 | 0 | |
| UNIVERSITY OF ALABAMA HOSPITAL | airport | United States | 33.51 | -86.80 | 787 | 0 | |
| UNIVERSITY OF CHICAGO HOSPITALS | airport | United States | 41.79 | -87.60 | 665 | 0 | |
| UNIVERSITY OF FLORIDA | airport | United States | 29.64 | -82.35 | 125 | 0 | |
| UNIVERSITY OF IOWA HOSPITALS & CLINIC | airport | United States | 41.66 | -91.55 | 840 | 0 | |
| UNIVERSITY OF IOWA HOSPITALS & CLINIC NO2 | airport | United States | 41.67 | -91.60 | 790 | 0 | |
| UNIVERSITY OF KANSAS MEDICAL CENTER | airport | United States | 39.06 | -94.61 | 958 | 0 | |
| UNIVERSITY OF MARYLAND SHOCK TRAUMA CENTER | airport | United States | 39.29 | -76.63 | 166 | 0 | |
| UNIVERSITY OF MN HOSPITALS & CLINICS | airport | United States | 44.97 | -93.23 | 890 | 0 | |
| UNIVERSITY OF NM HOSPITAL | airport | United States | 35.09 | -106.62 | 5273 | 0 | |
| UNIVERSITY OF OKLAHOMA WESTHEIMER | airport | United States | 35.25 | -97.47 | 1182 | 0 | |
| UNIVERSITY OF PITT MEDICAL LANDING AREA | airport | United States | 41.95 | -78.67 | 1481 | 0 | |
| UNIVERSITY OF VIRGINIA HOSPITAL | airport | United States | 38.03 | -78.50 | 490 | 0 | |
| UNIVERSITY OXFORD | airport | United States | 34.38 | -89.54 | 452 | 0 | |
| UNIVERSITY PARK | airport | United States | 40.85 | -77.85 | 1239 | 0 | |
| UNIVERSITY POINTE MEDICAL OFFICE BLDG | airport | United States | 39.36 | -84.37 | 883 | 0 | |
| UNK (UNALAKLEET) | airport | United States | 63.89 | -160.80 | 21 | 0 | |
| UNKNOWN FIELD | airport | United States | 42.28 | -71.55 | 432 | 0 | |
| UNO MAS RANCH | airport | United States | 28.21 | -99.13 | 380 | 0 | |
| UNSICKER | airport | United States | 40.43 | -86.15 | 816 | 0 | |
| UNTIED ACRES | airport | United States | 42.23 | -88.77 | 800 | 0 | |
| UNU (DODGE CO) | airport | United States | 43.43 | -88.70 | 934 | 0 | |
| UNZICKER | airport | United States | 40.83 | -89.12 | 745 | 0 |