Most delayed flights from IAD: every route ranked

42 regularly flown nonstop routes from Washington Dulles 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	IAD → MGW Morgantown, WV	74%	6.1%	56 min	1	362
2	IAD → LGA New York, NY	74%	6.5%	20 min	1	999
3	IAD → ORD Chicago, IL	75%	1.0%	20 min	1	2,085
4	IAD → SJU San Juan, PR	76%	0.6%	20 min	2	707
5	IAD → EWR Newark, NJ	76%	2.6%	23 min	2	1,532
6	IAD → BOS Boston, MA	77%	2.5%	16 min	2	1,514
7	IAD → DFW Dallas/Fort Worth, TX	77%	1.9%	24 min	4	1,951
8	IAD → DTW Detroit, MI	78%	1.2%	24 min	4	1,133
9	IAD → SEA Seattle, WA	78%	1.0%	15 min	3	1,851
10	IAD → ATL Atlanta, GA	79%	2.1%	19 min	4	3,989
11	IAD → SFO San Francisco, CA	79%	0.8%	17 min	2	2,729
12	IAD → CVG Cincinnati, KY	81%	2.4%	17 min	2	534
13	IAD → FLL Fort Lauderdale, FL	81%	0.8%	15 min	2	781
14	IAD → MCO Orlando, FL	81%	1.1%	14 min	2	2,177
15	IAD → SMF Sacramento, CA	81%	1.4%	11 min	1	365
16	IAD → PHX Phoenix, AZ	82%	0.8%	12 min	2	1,036
17	IAD → ORF Norfolk, VA	82%	2.0%	13 min	2	689
18	IAD → BNA Nashville, TN	82%	0.8%	15 min	4	1,009
19	IAD → SLC Salt Lake City, UT	83%	1.4%	19 min	2	714
20	IAD → DEN Denver, CO	83%	0.5%	12 min	2	3,465
21	IAD → MIA Miami, FL	83%	0.8%	12 min	2	625
22	IAD → RDU Raleigh/Durham, NC	83%	1.3%	13 min	2	1,300
23	IAD → CMH Columbus, OH	83%	0.9%	13 min	2	980
24	IAD → TPA Tampa, FL	83%	0.8%	11 min	2	1,304
25	IAD → CLT Charlotte, NC	83%	2.6%	16 min	4	1,988
26	IAD → JAX Jacksonville, FL	84%	0.9%	14 min	3	778
27	IAD → LAX Los Angeles, CA	84%	0.8%	10 min	3	2,472
28	IAD → IND Indianapolis, IN	84%	1.0%	14 min	2	989
29	IAD → IAH Houston, TX	84%	0.4%	12 min	1	1,873
30	IAD → SAN San Diego, CA	84%	0.6%	9 min	2	1,402
31	IAD → CLE Cleveland, OH	85%	1.0%	13 min	2	1,050
32	IAD → PIT Pittsburgh, PA	85%	1.5%	12 min	2	1,227
33	IAD → AUS Austin, TX	85%	1.0%	10 min	3	1,042
34	IAD → MSP Minneapolis, MN	85%	1.5%	15 min	4	983
35	IAD → LAS Las Vegas, NV	86%	0.5%	11 min	2	1,077
36	IAD → BTV Burlington, VT	86%	1.6%	11 min	2	500
37	IAD → SAT San Antonio, TX	86%	0.6%	15 min	1	641
38	IAD → MSY New Orleans, LA	86%	0.6%	12 min	3	631
39	IAD → BDL Hartford, CT	86%	1.9%	10 min	2	1,077
40	IAD → CHS Charleston, SC	87%	1.1%	11 min	2	760
41	IAD → RSW Fort Myers, FL	87%	0.6%	12 min	1	468
42	IAD → PWM Portland, ME	88%	1.9%	9 min	2	787

Less frequent routes

Too few flights for a reliable ranking.

IAD → STT (Charlotte Amalie) 336 flts
IAD → PBI (West Palm Beach/Palm Beach) 334 flts
IAD → JST (Johnstown) 330 flts
IAD → PDX (Portland) 291 flts
IAD → ABQ (Albuquerque) 273 flts
IAD → SDF (Louisville) 236 flts
IAD → PHL (Philadelphia) 212 flts
IAD → SAV (Savannah) 205 flts
IAD → RIC (Richmond) 173 flts
IAD → HNL (Honolulu) 168 flts
IAD → BUF (Buffalo) 147 flts
IAD → JFK (New York) 146 flts
IAD → MCI (Kansas City) 146 flts
IAD → LYH (Lynchburg) 130 flts
IAD → ROC (Rochester) 128 flts
IAD → EYW (Key West) 114 flts
IAD → ANC (Anchorage) 110 flts
IAD → CKB (Clarksburg/Fairmont) 99 flts
IAD → SRQ (Sarasota/Bradenton) 98 flts
IAD → PSP (Palm Springs) 96 flts
IAD → TYS (Knoxville) 95 flts
IAD → SBN (South Bend) 95 flts
IAD → AVL (Asheville) 89 flts
IAD → PGD (Punta Gorda) 86 flts
IAD → SYR (Syracuse) 77 flts
IAD → PVD (Providence) 70 flts
IAD → BZN (Bozeman) 51 flts
IAD → VPS (Valparaiso) 29 flts
IAD → SCE (State College) 29 flts
IAD → HDN (Hayden) 16 flts
IAD → JAC (Jackson) 16 flts
IAD → EGE (Eagle) 16 flts
IAD → MYR (Myrtle Beach) 6 flts
IAD → STL (St. Louis) 4 flts
IAD → TVC (Traverse City) 3 flts
IAD → MSN (Madison) 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.