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GRM to HRO: distance & flight time
Grand Marais (Grand Marais Cook County Airport) → Harrison (Boone County Airport)
812 mi
1,307 km · 706 nm
2h 14m
estimated nonstop flight time
Same time
time difference · heading south
See live GRM→HRO fares Phone-only fares on this route — call free
Flight time details
812 miles nonstop takes roughly 2h 14m gate to gate, flying south. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- GRM — Grand Marais Cook County Airport · Grand Marais, United States
- HRO — Boone County Airport · Harrison, United States
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near GRM
- YQT · Thunder Bay Airport61 mi away
- LYU · Ely Municipal Airport67 mi away
- YIB · Atikokan Municipal Airport87 mi away
- CMX · Houghton County Memorial Airport100 mi away
Near HRO
- BKG · Branson Airport19 mi away
- FLP · Marion County Regional Airport32 mi away
- WMH · Ozark Regional Airport39 mi away
- FYV · Drake Field59 mi away
Frequently asked questions
How far is GRM from HRO?
The flight distance from Grand Marais (GRM) to Harrison (HRO) is 812 miles (1,307 km, 706 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GRM to HRO?
A nonstop flight takes about 2h 14m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from GRM to HRO?
Nonstop service on GRM–HRO depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 2h 14m nonstop estimate.
What is the cheapest way to fly from GRM to HRO?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GRM–HRO that never appear on search engines, with no booking fees.
Why are some GRM to HRO fares phone-only?
Consolidator contracts let us sell certain GRM–HRO tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.