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Busiest Intrastate Air Routes in the U.S.

Can you guess America's busiest air routes within each state by weekly frequencies?
Only states with at least one intrastate flight will be displayed.
You may answer with solely airport IATA codes.
Quiz by
Landoswag
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Last updated: January 29, 2026
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First submittedJanuary 16, 2026
Times taken316
Average score79.2%
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State
Origin
Destination
Alaska
Anchorage (ANC)
Fairbanks (FAI)
Arizona
Phoenix (PHX)
Tucson (TUS)
California
Los Angeles (LAX)
San Francisco (SFO)
Colorado
Denver (DEN)
Colorado Springs (COS)
Florida
Miami (MIA)
Orlando (MCO)
Georgia
Atlanta (ATL)
Savannah (SAV)
Hawaii
Honolulu (HNL)
Kahului (OGG)
Illinois
Chicago (ORD)
Peoria (PIA)
Massachusetts
Boston (BOS)
Nantucket (ACK)
Michigan
Detroit (DTW)
Grand Rapids (GRR)
Minnesota
Minneapolis (MSP)
Duluth (DLH)
Missouri
St. Louis (STL)
Kansas City (MCI)
Montana
Billings (BIL)
Sidney (SDY)
Nevada
Las Vegas (LAS)
Reno (RNO)
New Mexico
Albuquerque (ABQ)
Silver City (SVC)
New York
New York City (LGA)
Buffalo (BUF)
North Carolina
Charlotte (CLT)
Raleigh-Durham (RDU)
Oregon
Portland (PDX)
Medford (MFR)
Pennsylvania
Philadelphia (PHL)
Pittsburgh (PIT)
Tennessee
Nashville (BNA)
Memphis (MEM)
Texas
Dallas (DFW)
Houston (IAH)
Utah
Salt Lake City (SLC)
St. George (SGU)
Virginia
Washington D.C. (IAD)
Norfolk (ORF)
Washington
Seattle (SEA)
Spokane (GEG)
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5 Comments
FurSeal
+1
Level 78
Jan 24, 2026
Could you accept just Washington for Washington DC? I tried that as well as Dulles (I couldn't remember the airport code).
Landoswag
+1
Level 45
Jan 29, 2026
Done!
Nestormakhno
+1
Level 79
Jan 24, 2026
Anyone else having a problem with the page refreshing continuously after reaching about thirty correct answers on any quiz? bit of a random glitch i’ve got going on here.
AlmostAGenius
+3
Level 89
Jan 24, 2026
Hey, I really like this quiz idea and would like to nominate it, but I wanted to check to make sure that you weren' missing any states. I found a few that do have commercial flights that I think shouls be added. I got this info from the Wikipedia pages for each airport.

Tennessee: Memphis-Nashville-Knoxville have Southwest flights between them but I can't find exact numbers.

Montana: Cape Air in Billings has a few commercial flights, and Sidney, MT is the busiest.

Missouri: Southwest offers commercial flights between St. Louis and Kansas City, although I can't find exact numbers.

Kansas: On the airports' Wikipedia page, I find something about flights between Liberal and Dodge City, but I don't see references to that anywhere else, so it probably can be ignored.

Landoswag
+1
Level 45
Jan 29, 2026
Thanks for the interest and for catching those! I'll go ahead and add Tennessee, Montana, and Missouri.
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