| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| OSAGE CITY MUNI | airport | United States | 38.63 | -95.80 | 1105 | 0 | |
| OSAGE MUNI | airport | United States | 43.29 | -92.80 | 1168 | 0 | |
| OSAKA INTL | airport | Japan | 34.79 | 135.44 | 50 | 0 | |
| OSAN AB | airport | Korea, Republic of (South) | 37.09 | 127.03 | 40 | 0 | |
| OSAP (ALEPPO INTL) | airport | Syria | 36.18 | 37.22 | 1276 | 0 | |
| OSB (MOSUL) | airport | Iraq | 36.31 | 43.15 | 709 | 0 | |
| OSBORN AIRFIELD | airport | United States | 28.53 | -81.87 | 121 | 0 | |
| OSBORNE | airport | United States | 34.58 | -117.27 | 2900 | 0 | |
| OSBORNE MINE | airport | Australia | -22.08 | 140.56 | 935 | 0 | |
| OSBORNE MUNI | airport | United States | 39.43 | -98.68 | 1565 | 0 | |
| OSC (OSCODA WURTSMITH) | airport | United States | 44.45 | -83.39 | 634 | 0 | |
| OSCAR MACHADO ZULOAGA | airport | Venezuela | 10.29 | -66.82 | 2145 | 0 | |
| OSCEOLA COMMUNITY HOSPITAL | airport | United States | 43.41 | -95.74 | 1537 | 0 | |
| OSCEOLA MUNI | airport | United States | 38.02 | -93.69 | 900 | 0 | |
| OSCEOLA MUNI | airport | United States | 35.69 | -90.01 | 234 | 0 | |
| OSCEOLA MUNI | airport | United States | 41.05 | -93.69 | 1110 | 0 | |
| OSCEOLA RGNL HOSPITAL | airport | United States | 28.30 | -81.41 | 59 | 0 | |
| OSCEOLA SHERIFF'S OFC - BRONSON HWY | airport | United States | 28.28 | -81.34 | 66 | 0 | |
| OSCODA COUNTY | airport | United States | 44.68 | -84.13 | 1050 | 0 | |
| OSCODA WURTSMITH | airport | United States | 44.45 | -83.39 | 634 | 0 | |
| OSCURA AAF AUX | airport | United States | 33.49 | -106.18 | 4500 | 0 | |
| OSD (OSTERSUND) | airport | Sweden | 63.19 | 14.50 | 1233 | 0 | |
| OSDI (DAMASCUS INTL) | airport | Syria | 33.41 | 36.51 | 2020 | 0 | |
| OSDZ (DEIR ZZOR) | airport | Syria | 35.29 | 40.18 | 700 | 0 | |
| OSE (Omora Airport) | airport | -7.83 | 147.08 | 2540 | 0 | ||
| OSF (Ostafyevo International Airport) | airport | 55.51 | 37.51 | 568 | 0 | ||
| OSF FAMILY MEDICAL CENTER | airport | United States | 40.92 | -90.66 | 760 | 0 | |
| OSF SAINT FRANCIS MEDICAL CENTER | airport | United States | 40.70 | -89.59 | 585 | 0 | |
| OSG (Ossima Airport) | airport | -2.92 | 141.30 | 205 | 0 | ||
| OSH | airport | Kyrgyzstan | 40.61 | 72.79 | 2927 | 0 | |
| OSH (WITTMAN RGNL) | airport | United States | 43.98 | -88.56 | 808 | 0 | |
| OSHAWA | airport | Canada | 43.92 | -78.89 | 459 | 0 | |
| OSHIMA | airport | Japan | 34.78 | 139.36 | 130 | 0 | |
| OSHKOSH SKY RANCH | airport | United States | 44.02 | -88.71 | 770 | 0 | |
| OSI (OSIJEK) | airport | Croatia | 45.46 | 18.81 | 290 | 0 | |
| OSIJEK | airport | Croatia | 45.46 | 18.81 | 290 | 0 | |
| OSK (OSKARSHAMN) | airport | Sweden | 57.35 | 16.50 | 96 | 0 | |
| OSKALOOSA MUNI | airport | United States | 41.23 | -92.49 | 840 | 0 | |
| OSKARSHAMN | airport | Sweden | 57.35 | 16.50 | 96 | 0 | |
| OSKL (KAMISHLY) | airport | Syria | 37.02 | 41.19 | 1480 | 0 | |
| OSL (GARDERMOEN) | airport | Norway | 60.19 | 11.10 | 681 | 0 | |
| OSLK (BASSEL AL ASSAD INTL) | airport | Syria | 35.40 | 35.95 | 157 | 0 | |
| OSMANY INTL | airport | Bangladesh | 24.96 | 91.87 | 50 | 0 | |
| OSN (OSAN AB) | airport | Korea, Republic of (South) | 37.09 | 127.03 | 40 | 0 | |
| OSNOVA INTL | airport | Ukraine | 49.92 | 36.29 | 508 | 0 | |
| OSO (OSBORNE MINE) | airport | Australia | -22.08 | 140.56 | 935 | 0 | |
| OSO CANYON | airport | United States | 30.02 | -101.55 | 1820 | 0 | |
| OSP (REDZIKOWO) | airport | Poland | 54.48 | 17.11 | 217 | 0 | |
| OSPR (PALMYRA) | airport | Syria | 34.56 | 38.32 | 1322 | 0 | |
| OSR (MOSNOV) | airport | Czech Republic | 49.70 | 18.11 | 844 | 0 | |
| OSS (OSH) | airport | Kyrgyzstan | 40.61 | 72.79 | 2927 | 0 | |
| OSSIPORT | airport | United States | 30.32 | -97.87 | 818 | 0 | |
| OST (OOSTENDE) | airport | Belgium | 51.20 | 2.86 | 13 | 0 | |
| OSTERMAN | airport | United States | 40.49 | -74.74 | 200 | 0 | |
| OSTERSUND | airport | Sweden | 63.19 | 14.50 | 1233 | 0 | |
| OSU (OHIO STATE UNIVERSITY) | airport | United States | 40.08 | -83.07 | 905 | 0 | |
| OSW (ORSK) | airport | Russia | 51.07 | 58.60 | 909 | 0 | |
| OSWALDO GUEVARA MUJICA | airport | Venezuela | 9.55 | -69.24 | 741 | 0 | |
| OSWEGO CO | airport | United States | 43.35 | -76.39 | 475 | 0 | |
| OSWEGO COUNTY AT PULASKI | airport | United States | 43.55 | -76.09 | 445 | 0 | |
| OSWEGO MUNI | airport | United States | 37.16 | -95.04 | 830 | 0 | |
| OSY (Namsos Høknesøra Airport) | airport | 64.47 | 11.58 | 7 | 0 | ||
| OSZ (Koszalin Zegrze Airport) | airport | 54.04 | 16.27 | 249 | 0 |