Related to this thread. In other words, airport to airport within the state, commercial or private, airport, air strip, or water landing.
For me:
Alaska
California
Washington
Minnesota
USVI
As a destination, just New York. Before deregulation we used to drive to Buffalo and fly from there to Syracuse because my mom didn’t like to drive and it would cut a few hours from the drive to visit my grandparents.
Within the state as a connector flight, you can add Florida and maybe Pennsylvania.
Just Colorado, California and Texas, for me. I can’t imagine it’s that common, except for commuters.
AK: Anchorage to Kenai
NM: Farmington to Albuquerque
WY: Cheyenne to Casper
CO: Denver to Grand Junction
TX: Dallas to Houston
KS: Lawence to Wichita
IA: Waterloo to Des Moines
MO: St. Louis to Kansas City
MN: Minneapolis-St. Paul to Brainerd
ND: Williston to Dickinson
IN: South Bend to Indianapolis
MI: Detroit to Grand Rapids
PA: Pittsburgh to Philadelphia
GA: Atlanta to Savannah
FL: Orlando to Miami
In some states there were more routes, but these were the first to come to mind. Some were commercial flights, some were in a company plane when I was still doing site accident investigations, and one was with friends in a small plane.
At first I was going to answer zero, but then I recalled that the Cincinatti Airport is actually in Kentucky. I’ve frequently been on flights where the last leg of the journey was from Cincinatti to Lexington, so I’ve flown within Kentucky.
Assuming that one intra-state flight of a longer trip counts (e.g. Sacramento->Seattle->Spokane counts for Washington), then:
California
Oregon
Washington
Idaho
Hawaii
The only flight I’ve ever been on which landed in the same state as it took off from was my home state of Ohio. I’d never been on an airplane as a kid, and thought it sounded fun, so a family friend chartered a hop in a small general-aviation for me. For actual travel, it seems like it’d hardly ever be practical.
EDIT: Wait, come to think of it, I might also have Texas. I went to a conference in Brownsville, once, which required two hubs. I can’t remember where the second one was, but it might have been Dallas or Houston.
Pennsylvania
Ohio
California
1 if we specify airports:
CA, San Luis Obispo to San Francisco.
1 more if you count:
AZ, an air tour of the Grand Canyon, to/from the same private air field.
California (various airports around LA and SF)
Nevada (countless Reno-Vegas flights)
Texas (Houston-Laredo)
New York (NYC-Syracuse)
Maryland (aerobatic ride in a friend’s Stearman)
Pennsylvania - had a flight from Pittsburgh diverted to Philly because of weather in Baltimore
Forgot Maryland and Pennsylvania when I posted in the other thread.
California
Hawaii
Colorado
New York
I’ve only done this as parts of a longer trip without changing planes. I’ve flown two Columbus OH going through Cleveland and to Miami going through Orlando.
No need to specify airports. Besides flying from Anchorage to Ketchikan, Juneau, Sitka, Valdez, Kodiak, Kotzebue, Nome, Fairbanks, Barrow, Cape Romanzof, Tin City, Indian Mountain, King Salmon, Barter Island, Cape Newenham, Sparrevohn, Cape Lisburne, and Fort Yukon, which have designators, I’ve also flown on charter from King Salmon to Naknek Lake by float plane, and from Anchorage to Finger Lake on a ski plane. It all counts.
I’ve gone skydiving in 37 states- landed at the same airport I took off from in each one, but not in the airplane.
California, Alaska, Kansas and Texas. Kansas was strictly in private planes.
After deep thought, 4.
Wisconsin
Illinois
Indiana
Michigan
Tennessee
If you include non-US second-level entities, I have flown within two: Ontario (Toronto to Sault Ste Marie), and British Columbia (Vancouver to Comox). The BC trip was a long time ago, when I was a kid; I seem to recall it being some sort of medium-sized jet; these days, it would be a turboprop.
Had to think about this one.
Scheduled airlines:
Ohio: Akron to Cleveland
California: Oakland-LAX
Texas: El Paso-Houston and Dallas-Corpus Christi
Florida: Tampa-West Palm Beach
Missouri: Kansas City-St. Louis
From/to same airport:
Arizona: Grand Canyon overflight
Missouri: Old Ford Trimotor
None. Even my general aviation trips have been interstate. I simply can’t think of any intrastate flights and at my last count, I had been to well over 150 airports. And now I thought of one:
1! Colorado: Grand Junction to DIA. We were diverted to Grand Junction for 5 hours due to hail and tornado at DIA so totally unscheduled and surreal 15+ 737s+ unloading into a terminal with seemingly 3 full time employees. Pizza restaurants couldn’t make enough pizza to be delivered, but everyone took it fairly well with sharing of the electrical outlets and their letting us mill about on the tarmac (I am just so thankful it wasn’t raining there!).