| SeaTac to Johnstown (Pennsylvania) | 2,185.49 mi (3,517.21 km) |
| SeaTac to Joliet (Illinois) | 1,717.55 mi (2,764.13 km) |
| SeaTac to Jonesboro (Arkansas) | 1,802.81 mi (2,901.34 km) |
| SeaTac to Joplin (Missouri) | 1,579.99 mi (2,542.75 km) |
| SeaTac to Joppatowne (Maryland) | 2,335.10 mi (3,757.98 km) |
| SeaTac to Juana Díaz (Puerto Rico) | 3,721.38 mi (5,988.98 km) |
| SeaTac to Junction City (Kansas) | 1,398.40 mi (2,250.51 km) |
| SeaTac to Juneau (Alaska) | 904.34 mi (1,455.40 km) |
| SeaTac to Jupiter (Florida) | 2,674.59 mi (4,304.34 km) |
| SeaTac to Jupiter Farms (Florida) | 2,669.74 mi (4,296.53 km) |
| SeaTac to Jurupa Valley (California) | 962.14 mi (1,548.41 km) |
| SeaTac to Justice (Illinois) | 1,725.50 mi (2,776.92 km) |
| SeaTac to Kahului (Hawaii) | 2,642.73 mi (4,253.06 km) |
| SeaTac to Kailua (Hawaii) | 2,665.77 mi (4,290.13 km) |
| SeaTac to Kalamazoo (Michigan) | 1,815.39 mi (2,921.59 km) |
