Most delayed flights from SEA: every route ranked

74 regularly flown nonstop routes from Seattle–Tacoma International Airport, worst on-time record first (Aug 2025 – Jul 2026). Routes with fewer than 360 flights in the period are listed separately.

#	Destination	On time	Cancelled	Avg delay	Airlines	Flights
1	SEA → SFO San Francisco, CA	62%	1.1%	23 min	5	6,791
2	SEA → HNL Honolulu, HI	66%	0.9%	25 min	3	2,933
3	SEA → LIH Lihue, HI	73%	0.7%	16 min	2	1,094
4	SEA → OAK Oakland, CA	74%	0.7%	14 min	3	1,895
5	SEA → KOA Kona, HI	74%	1.2%	14 min	2	1,421
6	SEA → BOS Boston, MA	75%	1.3%	17 min	3	2,502
7	SEA → ORD Chicago, IL	76%	1.3%	20 min	4	5,551
8	SEA → SAT San Antonio, TX	76%	0.9%	11 min	1	558
9	SEA → SAN San Diego, CA	76%	1.0%	12 min	4	4,595
10	SEA → ANC Anchorage, AK	76%	0.8%	13 min	3	6,657
11	SEA → IND Indianapolis, IN	77%	1.2%	11 min	1	565
12	SEA → JFK New York, NY	77%	2.9%	16 min	3	2,906
13	SEA → CLE Cleveland, OH	77%	0.7%	11 min	1	455
14	SEA → PIT Pittsburgh, PA	78%	0.6%	12 min	1	470
15	SEA → FLL Fort Lauderdale, FL	78%	0.7%	11 min	2	826
16	SEA → LAS Las Vegas, NV	78%	0.8%	13 min	6	5,621
17	SEA → FAI Fairbanks, AK	78%	0.8%	12 min	2	2,291
18	SEA → DFW Dallas/Fort Worth, TX	78%	1.9%	18 min	4	5,229
19	SEA → KTN Ketchikan, AK	78%	0.2%	13 min	1	1,303
20	SEA → MIA Miami, FL	78%	0.9%	14 min	3	1,210
21	SEA → DEN Denver, CO	78%	0.7%	13 min	6	6,325
22	SEA → RNO Reno, NV	79%	1.0%	11 min	2	902
23	SEA → PHX Phoenix, AZ	79%	0.7%	13 min	7	7,225
24	SEA → ABQ Albuquerque, NM	79%	0.5%	10 min	2	548
25	SEA → BNA Nashville, TN	79%	0.9%	11 min	3	1,476
26	SEA → OGG Kahului, HI	79%	0.4%	11 min	3	1,809
27	SEA → JNU Juneau, AK	79%	1.1%	12 min	2	1,588
28	SEA → AUS Austin, TX	79%	0.9%	13 min	3	2,068
29	SEA → RDU Raleigh/Durham, NC	80%	1.0%	10 min	2	918
30	SEA → TPA Tampa, FL	80%	0.5%	11 min	2	975
31	SEA → BUR Burbank, CA	80%	2.2%	10 min	2	1,622
32	SEA → MCI Kansas City, MO	80%	0.9%	13 min	3	1,131
33	SEA → BWI Baltimore, MD	80%	0.4%	9 min	2	719
34	SEA → CMH Columbus, OH	80%	0.4%	10 min	5	464
35	SEA → IDA Idaho Falls, ID	80%	0.3%	11 min	1	367
36	SEA → MSY New Orleans, LA	81%	0.3%	9 min	2	627
37	SEA → SJC San Jose, CA	81%	0.6%	10 min	5	4,384
38	SEA → MDW Chicago, IL	81%	0.4%	9 min	1	678
39	SEA → MCO Orlando, FL	82%	0.7%	10 min	2	1,820
40	SEA → SMF Sacramento, CA	82%	0.4%	10 min	3	4,381
41	SEA → SBA Santa Barbara, CA	82%	0.8%	11 min	2	363
42	SEA → DCA Washington, VA	82%	1.5%	12 min	2	1,092
43	SEA → PHL Philadelphia, PA	82%	1.5%	12 min	3	1,388
44	SEA → IAH Houston, TX	82%	0.4%	12 min	2	2,090
45	SEA → BZN Bozeman, MT	82%	0.4%	11 min	3	1,574
46	SEA → EWR Newark, NJ	82%	1.9%	13 min	2	2,264
47	SEA → ONT Ontario, CA	83%	1.0%	9 min	4	2,504
48	SEA → LAX Los Angeles, CA	83%	0.8%	11 min	6	7,454
49	SEA → TUS Tucson, AZ	83%	0.5%	9 min	3	1,065
50	SEA → OMA Omaha, NE	83%	0.0%	8 min	1	510
51	SEA → STL St. Louis, MO	83%	0.3%	9 min	2	883
52	SEA → GEG Spokane, WA	83%	1.0%	10 min	3	5,062
53	SEA → PDX Portland, OR	83%	0.7%	10 min	3	4,812
54	SEA → FAT Fresno, CA	83%	0.9%	10 min	2	925
55	SEA → PSP Palm Springs, CA	83%	1.0%	9 min	3	1,653
56	SEA → IAD Washington, VA	83%	0.6%	11 min	3	1,853
57	SEA → ATL Atlanta, GA	84%	0.6%	13 min	2	3,277
58	SEA → PSC Pasco/Kennewick/Richland, WA	84%	1.0%	11 min	2	1,726
59	SEA → MSO Missoula, MT	84%	0.8%	9 min	2	626
60	SEA → SLC Salt Lake City, UT	84%	0.8%	9 min	4	4,124
61	SEA → STS Santa Rosa, CA	84%	2.1%	9 min	2	428
62	SEA → SNA Santa Ana, CA	85%	0.8%	9 min	3	3,958
63	SEA → CVG Cincinnati, KY	85%	0.9%	8 min	2	793
64	SEA → EUG Eugene, OR	85%	1.3%	10 min	2	1,930
65	SEA → RDM Bend/Redmond, OR	85%	1.7%	8 min	2	1,907
66	SEA → BLI Bellingham, WA	85%	2.3%	9 min	1	1,216
67	SEA → DTW Detroit, MI	85%	0.8%	10 min	2	2,060
68	SEA → MKE Milwaukee, WI	86%	0.2%	6 min	1	509
69	SEA → BOI Boise, ID	86%	0.2%	8 min	2	3,881
70	SEA → MSP Minneapolis, MN	86%	0.8%	9 min	2	2,684
71	SEA → OKC Oklahoma City, OK	87%	0.2%	6 min	1	425
72	SEA → MFR Medford, OR	88%	1.0%	9 min	1	1,274
73	SEA → CLT Charlotte, NC	88%	1.2%	15 min	1	1,296
74	SEA → LWS Lewiston, ID	91%	0.3%	7 min	1	364

Less frequent routes

Too few flights for a reliable ranking.

SEA → CHS (Charleston) 347 flts
SEA → SIT (Sitka) 243 flts
SEA → SBP (San Luis Obispo) 220 flts
SEA → DAL (Dallas) 219 flts
SEA → JAC (Jackson) 203 flts
SEA → HOU (Houston) 120 flts
SEA → ACV (Arcata/Eureka) 115 flts
SEA → RDD (Redding) 113 flts
SEA → GTF (Great Falls) 106 flts
SEA → FCA (Kalispell) 48 flts
SEA → RSW (Fort Myers) 44 flts
SEA → HDN (Hayden) 44 flts
SEA → MRY (Monterey) 41 flts
SEA → EGE (Eagle) 38 flts
SEA → SUN (Sun Valley/Hailey/Ketchum) 38 flts
SEA → HLN (Helena) 10 flts
SEA → JAX (Jacksonville) 1 flts
SEA → WRG (Wrangell) 1 flts

Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.