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Ontario → Denver

ONT–DEN · Ontario International Airport to Denver International Airport

Best bet

Right side

Good betA real difference, not a rounding error.

Lake Powell leads it, with 6 more on the same side.

Flight paths move around. Treat this as the better bet, not a promise.

What you might see

In flight order, with distance measured from the representative route.

ONT to DEN: where each landmark sits relative to the routeA diagram of the representative route running left to right, with the departure airport at the left and the arrival airport at the right. Landmarks on the left side of the aircraft are plotted above the route line and landmarks on the right side below it, each at its distance from the route. The numbered list below this diagram carries the same information as text.ONTDENLEFT SIDERIGHT SIDE123456789101112
Distance from the route is to scale (up to 55 miles); the shaded ends are the 40-mile zones around each airport where the runway in use decides the view. Numbers match the list below. Hollow markers didn't count toward the recommendation.

  1. San Jacinto Peak

    RightEarly43 mi off the route

    San Jacinto Peak is about 43 miles off the right, early in the flight.

    Distant possibility

  2. San Gorgonio Mountain

    RightEarly22 mi off the route

    Early in the flight, San Gorgonio Mountain sits roughly 22 miles to the right.

    Good possibility

  3. Lake Mead

    LeftQuarter in32 mi off the route

    Look left about a quarter of the way in for Lake Mead, about 32 miles out.

    Distant possibility

  4. Grand Canyon

    RightHalfway43 mi off the route

    Grand Canyon is about 43 miles off the right, around the halfway mark.

    Good possibility

  5. Lake Powell

    RightHalfway9 mi off the route

    Around the halfway mark, Lake Powell sits roughly 9 miles to the right.

    Strong candidate

  6. Monument Valley

    RightHalfway44 mi off the route

    Look right around the halfway mark for Monument Valley, about 44 miles out.

    Distant possibility

  7. Canyonlands

    LeftThree quarters19 mi off the route

    Canyonlands is about 19 miles off the left, about three quarters of the way.

    Good possibility

  8. San Juan Mountains

    RightThree quarters41 mi off the route

    About three quarters of the way, San Juan Mountains sits roughly 41 miles to the right.

    Distant possibility

  9. Maroon Bells

    Either sideThree quarters5 mi off the route

    Maroon Bells passes almost directly beneath about three quarters of the way, which is the one place a window seat can't help you.

    Good possibility

  10. Mount Elbert

    Either sideNear the end5 mi off the route

    Mount Elbert passes almost directly beneath late in the flight, which is the one place a window seat can't help you.

    Good possibility

  11. Pikes Peak

    RightNear the end55 mi off the route

    Late in the flight, Pikes Peak sits roughly 55 miles to the right.

    Distant possibility

  12. Longs Peak

    LeftNear the end46 mi off the route

    Look left late in the flight for Longs Peak, about 46 miles out.

    Distant possibility

The sun

Flying soon? Add your date and departure time and we'll work out where the sun should be, and which side gets less of it.

Airport codes or city names. SEA, Seattle, and Seattle-Tacoma all work.

Skip the date and you still get the landmark answer. Add it and we work out where the sun will be, using the departure airport's local time.

The route we used

817 mi
Great-circle distance
57°
Course out of ONT
65°
Course into DEN
10
Landmarks that counted

That is the shortest path between the two airports, used as a representative corridor rather than a flight plan. The first and last 40 miles are treated as uncertain, because that part of the flight is shaped by the runway in use and the published departure or arrival procedure. Anything in those zones is listed and marked, never counted toward the recommendation.

Left and right, from where?

Left and right are from your perspective sitting in the cabin, facing the front of the aircraft. Seat letters are not a reliable guide to which side you are on, because aircraft are configured differently.

Why this isn't guaranteed

Flights don't follow the same path every day. Runway configuration, weather deviations, traffic, and air traffic control all move the track around, and none of it is knowable in advance. We also have nothing to say about cloud cover, which is the other thing standing between you and Mount Rainier. The full method.

Flying the other way?

Denver → OntarioLeft side

Calculated from scratch, not by flipping this one. The landmarks arrive in the opposite order, the sun is somewhere else entirely, and the answer changes with them.

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