Honolulu to Chicago Midway Turbulence Forecast

HNL → MDW · 4,246 miles · ~8h 60m

What to Expect

That Honolulu to Chicago Midway flight is a long one, and it does cross a lot of different types of terrain, which means it could have a few bumps along the way. Right after you leave Honolulu, you'll be over the open Pacific, and that can bring what's called Oceanic Clear-Air Turbulence, or sometimes just some ordinary convection from the ocean itself. As you approach the Pacific Coast, there can be Clear-Air Turbulence, too. Then, when you're crossing the Sierra Nevada and Central Rockies, you might feel some Mountain Wave Turbulence. Later, as you're over the Great Plains and approaching the Great Lakes, you could experience Clear-Air Turbulence again, or even some Lake-Effect Turbulence. Finally, closer to Chicago, in the Mississippi and Ohio Valleys, there's a chance of Convective Turbulence, or even Frontal Turbulence. All of this sounds like a lot, but pilots are very familiar with these patterns, and they're constantly monitoring and adjusting the flight path to find the smoothest possible ride.

Flights between Honolulu and Chicago Midway cross the Sierra Nevada, a steep mountain barrier in eastern California. The Sierra generates some of the most intense rotor and wave turbulence in the world — the famous "Sierra Wave" can reach the stratosphere. East-side downdrafts are especially sharp, and flights into or out of Reno or the Central Valley often feel the effects.

Turbulence Factors on This Route

• Oceanic Clear-Air Turbulence: Transoceanic jet stream crossings produce extended stretches of clear-air turbulence over the open Pacific.
• Oceanic Convection: Isolated thunderstorms over warm Pacific waters can develop away from radar coverage, catching flights off guard.
• Mountain Wave Turbulence: The Sierra Nevada produces the well-known Sierra Wave, one of the strongest mountain wave systems in North America.
• Frontal Turbulence: The Ohio Valley is a preferred storm track where frontal boundaries and embedded convection create turbulence year-round.

When Is This Route Bumpiest?

If you're looking for the smoothest possible flight, the sweet spot is usually spring, early summer, summer, early fall, and fall, when the weather patterns tend to be more stable. Winter, late summer, early spring, spring, late fall, and early winter can be a bit bumpier because of stronger jet streams that cause more Clear-Air Turbulence, and more unstable air over the mountains, leading to Mountain Wave Turbulence. The warmer months in the Mississippi and Ohio Valleys can see more thunderstorm activity, contributing to Convective Turbulence.

Tips for This Flight

If you can, aim to fly this route in the morning; the air is often calmer then, reducing the chance of Convective Turbulence later in the day. Any turbulence you do experience will likely feel like driving on a bumpy road, or perhaps a mild roller coaster. To help stay comfortable, choosing a seat over the wing can offer a bit more stability. Remember to stay hydrated and focus on slow, deep breaths to keep yourself relaxed, and know that the pilots are always working to ensure a safe and comfortable journey.

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Forecasts based on NOAA HRRR and GFS atmospheric model data.