Seattle (SEA) – Salt Lake City (SLC)
- Distance
- 1,108 km
- 688 mi · 598 nm
- Flight time
- 2 h / 2 h 15 min
- Average gate to gate: SEA → SLC / back
- Time difference
- 1 h
- CO2 per passenger
- 139 kg
- One way, economy, incl. RF (82 kg CO2 only)
- Passengers / year
- 1,106,553
- Aug 2025 – Jul 2026 · +2.6%
- Flights / week
- 160
- Both directions, average
- Seats filled
- 82%
- 1,353,234 seats a year
- Airlines nonstop
- 5
- DL, AS, OO
Traffic: U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service), Aug 2025 – Jul 2026. Distance: WGS-84 ellipsoid. CO2: UK DESNZ 2026 factors. Sources
The way there
- Heading from SEA
- 128°
- Heading from SLC
- 315°
- Halfway point
- 44.24, -116.85
- Great-circle km
- 1,107 km (sphere, for EU261)
- In the air SEA → SLC
- 1 h 32 min
- In the air SLC → SEA
- 1 h 42 min
- Clocks
- Salt Lake City is 1 h ahead of Seattle
The estimate for a route without real times is 2 h 5 min; how it is worked out is on Sources.
Show as a table
| Month | Passengers |
|---|---|
| Aug 2025 | 112,449 |
| Sep 2025 | 100,081 |
| Oct 2025 | 94,118 |
| Nov 2025 | 73,170 |
| Dec 2025 | 82,024 |
| Jan 2026 | 78,715 |
| Feb 2026 | 77,756 |
| Mar 2026 | 88,528 |
| Apr 2026 | 85,449 |
| May 2026 | 93,507 |
| Jun 2026 | 104,684 |
| Jul 2026 | 116,072 |
Show as a table
| Month | Flights |
|---|---|
| Aug 2025 | 813 |
| Sep 2025 | 797 |
| Oct 2025 | 723 |
| Nov 2025 | 592 |
| Dec 2025 | 614 |
| Jan 2026 | 609 |
| Feb 2026 | 595 |
| Mar 2026 | 664 |
| Apr 2026 | 649 |
| May 2026 | 702 |
| Jun 2026 | 728 |
| Jul 2026 | 826 |
Airlines flying SEA–SLC nonstop
| Airline | Flights / week | Share of passengers |
|---|---|---|
| DLDelta Air Lines | 86 | 59% |
| ASAlaska Airlines | 54 | 34% |
| OOSkyWest Airlines | 16 | 5% |
| F9Frontier Airlines | 3.3 | 2% |
| QXHorizon Air | 0.8 | 0% |
Both directions, Aug 2025 – Jul 2026. Airlines with at least one flight a month. U.S. DOT, Bureau of Transportation Statistics, T-100 Segment (all carriers, scheduled service). Sources
Aircraft on this route
- Boeing 737-800 · 2,479 flights
- Boeing 737-900ER · 2,111 flights
- Airbus Industrie A321-200n · 1,031 flights
- Embraer ERJ-175 · 872 flights
- Boeing B737 Max 900 · 786 flights
- Airbus Industrie A321Neoxlr · 440 flights
- Boeing 737-700/700LR/Max 7 · 194 flights
- A220-300 BD-500-1A11 · 142 flights
Also carried: 449 tonnes of freight and 66 tonnes of mail a year (passenger and cargo flights).
Punctuality
- On time
- 81.9%
- Arrived within 15 min of schedule
- Average delay
- 10 min
- Late arrivals count, early ones as 0
- Cancelled
- 0.9%
- Flights counted
- 8,249
- Aug 2025 – Jul 2026
| Airline | On time | Average delay |
|---|---|---|
| DLDelta Air Lines | 84.8% | 9 min |
| ASAlaska Airlines | 78.8% | 11 min |
| OOSkyWest Airlines | 78.5% | 14 min |
| F9Frontier Airlines | 70.7% | 18 min |
Delay minutes by cause: airline 43% · aircraft arriving late 36% · air traffic system 17% · weather 4% · security 0%.
Both directions, Aug 2025 – Jul 2026. BTS Reporting Carrier On-Time Performance (US domestic flights of the larger US airlines). Sources
What passengers paid
- Average fare, Q1 2026
- $204
- One way, all cabins
- Average over a year
- $211
- Q3 2025 – Q1 2026
- Largest airline
- Alaska Airlines
- 50% of passengers · $178
- Lowest-fare airline
- Alaska Airlines
- 50% of passengers · $178
History, not a price to book: what the average passenger paid per one-way trip in each quarter (Q3 2025 $217 · Q4 2025 $209 · Q1 2026 $204).
U.S. DOT Consumer Airfare Report, Table 1a (airline ticket sample, US domestic airport pairs). Sources
Delay compensation (EU261 / UK261)
Measured by great-circle distance: 1,107 km.
Neither EU261 nor UK261 covers this route: it neither starts nor ends in the EU, EEA, Switzerland or the UK. Other countries have their own rules (for example Canada's APPR or Brazil's ANAC rules).
Also owed for a cancellation with less than 14 days' notice or denied boarding. Not owed for extraordinary circumstances. On a connection, the distance to the final destination counts. From 23 October 2027 the EU's Regulation 2026/2202 applies; it keeps these amounts (what changes in 2027). Information, not legal advice.
Every airport pair between Seattle and Salt Lake City
Kilometres. Linked numbers have a page of their own. All Seattle airports
More routes from SEA
| Route | Distance | Passengers / year |
|---|---|---|
| SEA → DEN | 1,648 km | 1,819,437 |
| SEA → PHX | 1,781 km | 1,813,338 |
| SEA → LAX | 1,535 km | 1,810,795 |
| SEA → ANC | 2,331 km | 1,694,688 |
| SEA → SFO | 1,092 km | 1,628,228 |
| SEA → ORD | 2,769 km | 1,622,991 |
| SEA → LAS | 1,394 km | 1,596,435 |
| SEA → DFW | 2,671 km | 1,577,921 |
| SEA → SAN | 1,690 km | 1,233,726 |
| SEA → ATL | 3,511 km | 1,090,727 |