Which side of the plane should I sit on to avoid the sun from Denver (DEN) to Seattle (SEA)?
On this route the shady side depends on the date as well as the time of day. Add a departure date to see yours.
Which side of the plane should I sit on to avoid the sun from Denver (DEN) to Seattle (SEA)?
On this route the shady side depends on the date as well as the time of day. Add a departure date to see yours.
Which side of the plane should I sit on to avoid the sun from Denver (DEN) to Seattle (SEA)?
On this route the shady side depends on the date as well as the time of day. Add a departure date to see yours.
Denver → Seattle
A medium flight within United States. You gain 1 hour on arrival.
The Mile High City
Denver sits exactly a mile above sea level where the Great Plains meet the Rocky Mountains, a compact downtown ringed by wide, flat suburbs. It is the gateway to the mountains for skiing and hiking, and much of its draw is what lies a short drive west. The core is walkable and a rail line runs in from the airport, but the wider region runs on the car. The altitude is real, so take the first day easy.
Surrounding hubs
| 628 km / 390 mi | |
| 968 km / 601 mi | |
| 1,009 km / 627 mi |
The Emerald City
Seattle is built across hills and water, squeezed between Puget Sound and Lake Washington, with its core neighborhoods threaded between the two. Light rail runs the length of the city and out to the suburbs, making it one of the more transit-friendly West Coast cities, though the hills and water still shape how neighborhoods connect. Rain is frequent but usually light, more gray drizzle than downpour, especially from fall through spring. Traffic across the bridges and the floating highway can bottleneck badly at peak times.
Nearby airports
| 205 km / 127 mi |
Surrounding hubs
| 727 km / 452 mi | |
| 1,093 km / 679 mi | |
| 1,107 km / 688 mi |
Find out which side of the plane to sit on.
Pick your airports, set your departure time, and you're done.
We calculate the sun's position based on your flight path and departure time, then tell you which side of the plane gets direct sun and which stays shaded. No guessing, just math.
Enter your flight
Pick your departure and arrival airports and set your departure time at the departure airport. FlightSide estimates the duration and you can adjust it if you know the exact schedule.
We track the sun along your route
Your flight path is broken into hundreds of points. At each one we check where the sun is and which side of the plane it faces.
You get a recommendation
Which side of the plane to sit on, left or right, depending on whether you'd rather avoid the sun or enjoy it. The percentages and the map are there if you want to see why.
Want to go deeper? Accuracy, edge cases, polar routes — see the FAQ →
Notes from the product.
Small updates, route observations, and clearer explanations for how the app keeps evolving.
Over the top, and other ways to fly
FlightSide now has Explore, a map of popular flights grouped by the path they fly, and a Guide with step-by-step walkthroughs for checking, sharing and using FlightSide offline.
Type less, wait less, wonder more
Airport search now understands metro codes and old city names, FlightSide loads noticeably faster, and a new Feeling lucky button chooses a flight for anyone without one in mind.
A closer look at the route, not just the seat
FlightSide now shows the two cities and key details about the flight alongside the seat recommendation: confirm you picked the right airports, read the time change off two clocks, and check the return leg.