Birmingham (BHM)

- Southwest, Year-round
- United, Year-round

Huntsville (HSV)

- United, Year-round

Anchorage (ANC)

- Alaska Airlines, Seasonal
- United, Year-round

Phoenix (PHX)

- American, Year-round
- Frontier, Year-round
- Southwest, Year-round
- United, Year-round

Prescott (PRC)

- United, Year-round

Tuscon (TUS)

- Frontier, Seasonal
- Southwest, Year-round
- United, Year-round

Little Rock (LIT)

- United, Year-round

Bakersfield (BFL)

- United, Year-round

Bishop (BIH)

- United, Seasonal

Burbank (BUR)

- Southwest, Year-round
- United, Year-round

Eureka (ACV)

- United, Year-round

Fresno (FAT)

- Southwest, Year-round
- United, Year-round

Long Beach (LGB)

- Southwest, Year-round

Los Angeles (LAX)

- American, Seasonal
- Delta, Year-round
- Southwest, Year-round
- Spirit, Seasonal
- United, Year-round

Monterey (MRY)

- United, Year-round
 

Oakland (OAK)

- Frontier, Year-round
- Southwest, Year-round
 

Ontario (ONT)

- Frontier, Year-round
- Southwest, Year-round
- United, Year-round

Orange County (SNA)

- Fronter, Year-round
- Southwest, Year-round
- United, Year-round
 

Palm Springs (PSP)

- Frontier, Seasonal
- Southwest, Year-round
- United, Year-round

Sacramento (SMF)

- Frontier, Year-round
- Southwest, Year-round
- United, Year-round

San Diego (SAN)

- Frontier, Year-round
- Southwest, Year-round
- United, Year-round

San Francisco (SFO)

- Frontier, Year-round
- Southwest, Year-round
- United, Year-round

San Jose (SJC)

- Southwest, Year-round
- United, Year-round

San Luis Obispo (SBP)

- United, Year-round
 

Santa Barbara (SBA)

- Southwest, Year-round
- United, Year-round

Alamosa (ALS)

- Denver Air Connection, Year-round

Aspen (ASE)

- United, Year-round
 

Colorado Springs (COS)

-Southwest, Year-round
- United, Year-round

Cortez (CEZ)

- Denver Air Connection, Year-round
- Southwest, Year-round
- United, Year-round

Durango (DRO)

- United, Year-round
 

Grand Junction (GJT)

- United, Year-round

Gunnison (GUC)

- United, Year-round

Montrose (MTJ)

-Southwest, Seasonal
- United, Year-round

Pueblo (PUB)

- Southern Airways Express, Year-round

Steamboat Springs (HDN)

- Southwest, Seasonal
- United, Year-round

Telluride (TEX)

- Denver Air Connection, Year-round

Vail (EGE)

- United, Year-round

Hartford (BDL)

- Frontier, Seasonal
- Southwest, Year-round
- United, Year-round

No Nonstop Service

Fort Lauderdale (FLL)

- Southwest, Year-round
- Spirit, Year-round
- United, Year-round

Fort Myers (RSW)

- Frontier, Year-round
- Southwest, Year-round
- United, Year-round

Jacksonville (JAX)

- Southwest, Year-round
- United, Year-round

Miami (MIA)

- American, Year-round
- Frontier, Year-round
- Southwest, Seasonal
- Spirit, Year-round
- United, Seasonal

Orlando (MCO)

- Frontier, Year-round
- Spirit, Seasonal
- Southwest, Year-round
- United, Year-round

Palm Beach (PBI)

- Frontier, Seasonal

Pensacola (PNS)

- Frontier, Year-round
- Southwest, Seasonal
- United, Seasonal

Sarasota (SRQ)

- Southwest, Seasonal
- United, Seasonal

Tampa (TPA)

- Frontier, Year-round
- Southwest, Year-round
- United, Year-round

Atlanta (ATL)

- Delta, Year-round
- Fronter, Year-round
- Southwest, Year-round
- Spirit, Year-round
- United, Year-round

Savannah (SAV)

- United, Year-round
- Southwest

Honolulu/Oahu (HNL)

- United, Year-round

Kahului/Maui (OGG)

- United, Year-round

Kona/Hawaii (KOA)

- United, Year-round

Lihue/Kauai (LIH)

- United, Year-round

Boise (BOI)

- Southwest, Year-round
- United, Year-round

Idaho Falls (IDA)

- United, Year-round

Lewiston (LWS)

- United, Year-round

Sun Valley (SUN)

- United, Seasonal

Bloomington (BLI)

- Frontier, Seasonal

Chicago-Midway (MDW)

- Frontier, Year-round
- Southwest, Year-round

Chicago-O'Hare (ORD)

- American, Year-round
- Southwest, Year-round
- Spirit, Year-round
- United, Year-round

Moline (MLI)

- United, Year-round

Peoria (PIA)

- Allegiant, Seasonal

Indianapolis (IND)

- Frontier, Year-round
- Southwest, Year-round
- United, Year-round

Cedar Rapids (CID)

- Frontier, Year-round
- United, Year-round

Des Moines (DSM)

- Frontier, Year-round
- United, Year-round
- Southwest, Year-round

Sioux City (SUX)

- United, Year-round

Dodge City (DDC)

- United, Year-round

Hays (HYS)

- United, Year-round

Liberal (LBL)

- United, Year-round

Salina (SLN)

- United, Year-round

Wichita (ICT)

- Southwest, Year-round
- United, Year-round

Louisville (SDF)

- Southwest, Year-round
- United, Year-round

New Orleans (MSY)

- Frontier, Year-round
- Southwest, Year-round
- United, Year-round

Shreveport (SHV)

- United, Year-round

Portland (PWM)

- United, Seasonal

Baltimore (BWI)

- Frontier, Year-round
- Spirit, Year-round
- Southwest, Year-round
- United, Year-round

Boston (BOS)

- Delta, Year-round
- JetBlue, Year-round
- Southwest, Year-round
- United, Year-round

Detroit (DTW)

- Delta, Year-round
- Frontier, Seasonal
- Southwest, Year-round
- United, Year-round

Grand Rapids (GRR)

- Frontier, Seasonal
- Southwest, Year-round
- United, Year-round

Traverse City (TVC)

- United, Seasonal

Minneapolis/St. Paul (MSP)

- Delta, Year-round
- Frontier, Year-round
- Southwest, Year-round
- Sun Country, Year-round
- United, Year-round

No Nonstop Service

Joplin (JLN)

- United, Year-round

Kansas City (MCI)

- Frontier, Year-round
- Southwest, Year-round
- United, Year-round

Springfield (SGF)

- United, Year-round
 

St. Louis (STL)

- Frontier, Year-round
- Southwest, Year-round
- United, Year-round
 

Billings (BIL)

- Frontier, Year-round
- United, Year-round

Bozeman (BZN)

- Southwest, Year-round
- United, Year-round
 

Great Falls (GTF)

- United, Year-round
 

Helena (HLN)

- United, Year-round
 

Kalispell-Glacier (FCA)

- United, Year-round
 

Missoula (MSO)

- United, Year-round
 

West Yellowstone (WYS)

- United, Year--seasonal

Alliance (AIA)

- Denver Air Connection, Year-round

Chadron (CDR)

- Southern Airways, Year-round
 

Kearney (EAR)

- Denver Air Connection, Year-round

Lincoln (LNK)

- United, Year-round
 

McCook (MCK)

- Denver Air Connection, Year-round
 

North Platte (LBF)

- United, Year-round
 

Omaha (OMA)

- Frontier, Year-round
- Southwest, Year-round
- United, Year-round

Scottsbluff (BFF)

- United, Year-round
 

Las Vegas (LAS)

- Frontier, Year-round
- Southwest, Year-round
- Spirit, Year-round
- United, Year-round

Reno (RNO)

- Frontier, Year-round
- Southwest, Year-round
- United, Year-round
 

No Nonstop Service

Newark (EWR)

- United, Year-round

Albuquerque (ABQ)

- Southwest, Year-round
- United, Year-round

Clovis (CVN)

- Denver Air Connection, Year-round

Hobbs (HOB)

- United, Year-round

Santa Fe (SAF)

- United, Year-round
 

Albany (ALB)

- Southwest, Year-round

Buffalo (BUF)

- Fronter, Seasonal
- Southwest, Year-round

New York - JFK (JFK)

- Delta, Year-round
- JetBlue, Year-round
 

New York - La Guardia (LGA)

- Delta, Year-round
- JetBlue, Year-round
- Southwest, Year-round
- United, Year-round
 

Syracuse, NY (SYR)

- Frontier, Seasonal
- United, Year-round

Asheville (AVL)

- Allegiant, Seasonal
 

Charlotte-Douglas (CLT)

- American, Year-round
- Frontier, Year-round
- Southwest
- United, Year-round

Raleigh (RDU)

- Frontier, Year-round
- Southwest, Year-round
- United, Year-round
 

Bismarck (BIS)

- United, Year-round

Devils Lake (DVL)

- United, Year-round
 

Dickinson (DIK)

- United, Year-round
 

Fargo (FAR)

- Frontier, Year-round
- United, Year-round

Jamestown (JMS)

- United, Year-round
 

Minot (MOT)

- United, Year-round
 

Williston (XWA)

- United, Year-round
 

Cincinnati (CVG)

- Allegiant, Year-round
- Delta, Year-round
- Frontier, Year-round
- Southwest, Year-round
- United, Year-round

Cleveland (CLE)

- Frontier, Year-round
- Southwest, Year-round
- United, Year-round
 

Columbus (CMH)

- Frontier, Year-round
- Southwest, Year-round
- United, Year-round
 

Oklahoma City (OKC)

- Frontier, Year-round
- Southwest, Year-round
- United, Year-round

Tulsa (TUL)

- Southwest, Year-round
- United, Year-round  

Eugene (EUG)

- Southwest
- United, Year-round

Medford (MFR)

- United, Year-round
 

North Bend (OTH)

- United, Seasonal

Portland (PDX)

- Alaska, Year-round
- Frontier, Year-round
- Southwest, Year-round
- United, Year-round
 

Redmond (RDM)

- United, Year-round
 

Allentown/Lehigh Valley (ABE)

- Allegiant, Seasonal

Philadelphia (PHL)

- American, Year-round
- Frontier, Year-round
- Southweset, Year-round
- United, Year-round
 

Pittsburgh (PIT)

- Frontier, Seasonal
- Southwest, Year-round
- United, Year-round
 

No Nonstop Service.

Charleston (CHS)

- Frontier, Year-round
- Southwest, Seasonal
- United, Year-round

Greenville (GSP)

- United, Year-round

Myrtle Beach (MYR)

- Frontier, Seasonal
- Southwest

Pierre (PIR)

- Denver Air Connection, Year-round

Rapid City (RAP)

- United, Year-round
 

Sioux Falls (FSD)

- Frontier, Year-round
- United, Year-round
 

Watertown (ATY)

- Denver Air Connection, Year-round

Knoxville (TYS)

- Allegiant, Seasonal
- Frontier, Year-round
- United, Year-round

Memphis (MEM)

- Frontier, Year-round
- Southwest, Year-round
- United, Year-round
 

Nashville (BNA)

- Frontier, Year-round
- Southwest, Year-round
- United, Year-round
 

Amarillo (AMA)

- Southwest, Year-round
- United, Year-round

Austin (AUS)

- Frontier, Year-round
- Spirit, Year-round
- Southwest, Year-round
- United, Year-round

Dallas/Ft. Worth (DFW)

- American, Year-round
- Frontier, Year-round
- United, Year-round
 

Dallas-Love (DAL)

- Southwest, Year-round
 

El Paso (ELP)

- Frontier, Year-round
- Southwest, Year-round
- United, Year-round
 

Houston - Hobby (HOU)

- Frontier
- Southwest, Year-round

Houston - Intercontinental (IAH)

- Frontier, Year-round
- Southwest, Year-round
- Spirit, Year-round
- United, Year-round
 

Lubbock (LBB)

- Southwest
- United, Year-round
 

Midland (MAF)

- Southwest, Seasonal
- United, Year-round
 

San Antonio (SAT)

- Frontier, Year-round
- Southwest, Year-round
- United, Year-round
 

Moab (CNY)

- United, Year-round

Salt Lake City (SLC)

- Delta, Year-round
- Frontier, Year-round
- Southwest, Year-round
- United, Year-round

St. George (SGU)

- United, Year-round
 

Vernal (VEL)

- United, Year-round
 

Burlington (BTV)

- Frontier, Seasonal
- United, Seasonal

Norfolk (ORF)

- Frontier, Seasonal
- United, Year-round
 

Richmond (RIC)

- Southwest, Seasonal
- United, Year-round
 

Bellingham (BLI)

- Southwest, Year-round

Pasco (PSC)

- United, Year-round

Seattle (SEA)

- Alaska Airlines, Year-round
- Delta, Year-round
- Frontier, Year-round
- Southwest, Year-round
- United, Year-round

Spokane (GEG)

- Southwest, Year-round
- United, Year-round
 

Washington (DCA)

- Frontier, Year-round
- United, Year-round

Washington (IAD)

- Southwest, Year-round
- United, Year-round
 

No Nonstop Service

Appleton (ATW)

- Allegiant, Seasonal
- United, Year-round

Green Bay (GRB)

- Frontier, Seasonal

Madison (MSN)

- Frontier, Year-round
- United, Year-round

Milwaukee (MKE)

- Frontier, Year-round
- Southwest, Year-round
- United, Year-round
 

Casper (CPR)

- United, Year-round

Cheyenne (CYS)

- United, Year-round
 

Cody (COD)

- United, Year-round
 

Gillette (GCC)

- United, Year-round
 

Jackson Hole (JAC)

- United, Year-round
 

Laramie (LAR)

- United, Year-round
 

Riverton (RIW)

- United, Year-round
 

Rock Springs (RKS)

- United, Year-round

Sheridan (SHR)

- United, Year-round