Dulles (IAD) to Salt Lake City (SLC)
Flight time
≈ 4h 27m
Bearing
285° W
Dulles (IAD) to Salt Lake City (SLC) is 1,823 miles (2,935 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies IAD–SLC
Filed traffic dataIn May 2026, Delta Air Lines operated the most departures, one of 2 carriers flying nonstop IAD–SLC; the Boeing 737-800 was the most common aircraft at 50% of departures; flights ran 88% full.
Departures
123
May 2026
Seats
19,465
both directions
Passengers
17,099
both directions
Load factor
87.8%
RPM ÷ ASM
Who flies IAD–SLC?
Delta Air Lines operated the most nonstop IAD–SLC departures in May 2026 (62), one of 2 carriers on the route.
- DL
62 departures · 9,916 seats
Share of departures50.4%90.0%
Load
- UA
61 departures · 9,549 seats
Share of departures49.6%85.6%
Load
What plane flies IAD–SLC?
In May 2026, the Boeing 737-800 flew 50% of IAD–SLC departures — more than any other aircraft type.
- Boeing 737-800
61 departures · 90.0% load
49.6% - Boeing 737 MAX 8
32 departures · 86.8% load
26.0% - Boeing 737-700
18 departures · 90.9% load
14.6% - Boeing 737 MAX 9
9 departures · 78.5% load
7.3% - Boeing 737-900ER
2 departures · 67.0% load
1.6% - Airbus A320
1 departures · 92.4% load
0.8%
How has IAD–SLC traffic changed?
Nonstop IAD–SLC departures fell from 124 in June 2025 to 123 in May 2026.
Monthly nonstop IAD–SLC traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
124 departures · 17,046 passengers
90.9%
Load
July 2025
124 departures · 18,492 passengers
88.5%
Load
August 2025
126 departures · 17,375 passengers
87.7%
Load
September 2025
121 departures · 15,548 passengers
87.8%
Load
October 2025
125 departures · 15,524 passengers
84.8%
Load
November 2025
119 departures · 14,198 passengers
76.9%
Load
December 2025
89 departures · 11,852 passengers
81.7%
Load
January 2026
117 departures · 14,474 passengers
78.2%
Load
February 2026
108 departures · 13,292 passengers
84.4%
Load
March 2026
126 departures · 15,786 passengers
83.7%
Load
April 2026
120 departures · 16,004 passengers
81.5%
Load
May 2026
123 departures · 17,099 passengers
87.8%
Load
By direction
Each direction is filed separately — they rarely match.
IAD → SLC
87.0% full
62 departures · 8,546 passengers
SLC → IAD
88.7% full
61 departures · 8,553 passengers
Nonstop IAD–SLC traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through May 2026; filings from 2025. Public domain (US Government work).
The airports
Frequently asked
How far is Dulles (IAD) from Salt Lake City (SLC)?
IAD to SLC is 1,823 miles (2,935 km / 1,585 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from IAD to SLC?
A nonstop covers the 1,823-mile great-circle distance in roughly 4h 27m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies IAD–SLC?
In May 2026, the Boeing 737-800 flew the largest share of departures (49.6%), followed by the Boeing 737 MAX 8 (26.0%).
What mileage do I earn flying IAD–SLC?
Distance-based programs credit off the 1,823-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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