United Airlines at DEN

Calgary

Calgary International Airport

Edmonton

Edmonton International Airport

Fort McMurray

Fort McMurray International Airport

Codeshare

Montréal

Montreal / Pierre Elliott Trudeau International Airport

Codeshare

Regina

Regina International Airport

Codeshare

Saskatoon

Saskatoon John G. Diefenbaker International Airport

Codeshare

Toronto

Toronto Pearson International Airport

Codeshare

Vancouver

Vancouver International Airport

Winnipeg

Winnipeg / James Armstrong Richardson International Airport

Codeshare

Frankfurt am Main

Frankfurt Airport

Codeshare

Narita

Narita International Airport

Cancún

Cancún International Airport

Ciudad de México

Benito Juárez International Airport

Puerto Vallarta

Puerto Vallarta International Airport

San José del Cabo

Los Cabos International Airport

Alamosa

San Luis Valley Regional Airport/Bergman Field

Codeshare

Albuquerque

Albuquerque International Sunport

Codeshare

Alliance

Alliance Municipal Airport

Codeshare

Amarillo

Rick Husband Amarillo International Airport

Codeshare

Anchorage

Ted Stevens Anchorage International Airport

Aspen

Aspen-Pitkin County Airport (Sardy Field)

Codeshare

Atlanta

Hartsfield Jackson Atlanta International Airport

Codeshare

Austin

Austin Bergstrom International Airport

Bakersfield

Meadows Field

Codeshare

Baltimore

Baltimore/Washington International Thurgood Marshall Airport

Billings

Billings Logan International Airport

Birmingham

Birmingham-Shuttlesworth International Airport

Codeshare

Bismarck

Bismarck Municipal Airport

Codeshare

Boise

Boise Air Terminal/Gowen Field

Boston

General Edward Lawrence Logan International Airport

Bozeman

Bozeman Yellowstone International Airport

Burbank

Hollywood Burbank Airport

Codeshare

Casper

Casper-Natrona County International Airport

Codeshare

Cedar Rapids

The Eastern Iowa Airport

Codeshare

Cheyenne

Cheyenne Regional Jerry Olson Field

Codeshare

Chicago

Chicago O'Hare International Airport

Cincinnati / Covington

Cincinnati Northern Kentucky International Airport

Codeshare

Cleveland

Cleveland Hopkins International Airport

Cody

Yellowstone Regional Airport

Codeshare

Colorado Springs

City of Colorado Springs Municipal Airport

Codeshare

Columbus

John Glenn Columbus International Airport

Codeshare

Dallas-Fort Worth

Dallas Fort Worth International Airport

Dayton

James M. Cox Dayton International Airport

Codeshare

Des Moines

Des Moines International Airport

Detroit

Detroit Metropolitan Wayne County Airport

Codeshare

Dickinson

Dickinson Theodore Roosevelt Regional Airport

Codeshare

Dulles

Washington Dulles International Airport

Durango

Durango La Plata County Airport

Codeshare

Eagle

Eagle County Regional Airport

Codeshare

El Paso

El Paso International Airport

Codeshare

Eugene

Eugene Airport

Codeshare

Fargo

Hector International Airport

Codeshare

Farmington

Four Corners Regional Airport

Codeshare

Fayetteville/Springdale/Rogers

Northwest Arkansas National Airport

Codeshare

Fort Lauderdale

Fort Lauderdale Hollywood International Airport

Fort Myers

Southwest Florida International Airport

Fresno

Fresno Yosemite International Airport

Codeshare

Gillette

Northeast Wyoming Regional Airport

Codeshare

Grand Junction

Grand Junction Regional Airport

Grand Rapids

Gerald R. Ford International Airport

Codeshare

Great Falls

Great Falls International Airport

Codeshare

Gunnison

Gunnison Crested Butte Regional Airport

Codeshare

Hayden

Yampa Valley Airport

Codeshare

Helena

Helena Regional Airport

Codeshare

Honolulu, Oahu

Daniel K. Inouye International Airport

Houston

George Bush Intercontinental Airport

Huntsville

Huntsville International Airport

Codeshare

Idaho Falls

Idaho Falls Regional Airport

Codeshare

Indianapolis

Indianapolis International Airport

Codeshare

Jackson

Jackson Hole Airport

Kahului

Kahului International Airport

Kailua-Kona

Ellison Onizuka Kona International Airport at Keāhole

Kalispell

Glacier Park International Airport

Codeshare

Kansas City

Kansas City International Airport

Knoxville/Maryville

McGhee Tyson Airport

Codeshare

Laramie

Laramie Regional Airport

Codeshare

Las Vegas

Harry Reid International Airport

Lihue, Kauai

Lihue Airport

Lincoln

Lincoln Airport

Codeshare

Little Rock

Bill & Hillary Clinton National Airport/Adams Field

Codeshare

Los Angeles

Los Angeles International Airport

Louisville

Louisville Muhammad Ali International Airport

Codeshare

Lubbock

Lubbock Preston Smith International Airport

Codeshare

Madison

Dane County Regional Truax Field

Codeshare

Medford

Rogue Valley International-Medford Airport

Codeshare

Memphis

Memphis International Airport

Codeshare

Miami

Miami International Airport

Midland

Midland International Air and Space Port

Codeshare

Milwaukee

General Mitchell International Airport

Codeshare

Minneapolis

Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field

Minot

Minot International Airport

Codeshare

Missoula

Missoula Montana Airport

Codeshare

Moline

Quad City International Airport

Codeshare

Monterey

Monterey Peninsula Airport

Codeshare

Montrose

Montrose Regional Airport

Codeshare

Nashville

Nashville International Airport

Codeshare

Newark

Newark Liberty International Airport

New Orleans

Louis Armstrong New Orleans International Airport

New York

LaGuardia Airport

Oklahoma City

OKC Will Rogers World Airport

Codeshare

Omaha

Eppley Airfield

Ontario

Ontario International Airport

Codeshare

Orlando

Orlando International Airport

Palm Springs

Palm Springs International Airport

Codeshare

Pasco

Tri Cities Airport

Codeshare

Peoria

General Wayne A. Downing Peoria International Airport

Codeshare

Philadelphia

Philadelphia International Airport

Phoenix

Phoenix Sky Harbor International Airport

Pierre

Pierre Regional Airport

Codeshare

Pittsburgh

Pittsburgh International Airport

Portland

Portland International Airport

Pueblo

Pueblo Memorial Airport

Codeshare

Rapid City

Rapid City Regional Airport

Codeshare

Redmond

Roberts Field

Codeshare

Reno

Reno Tahoe International Airport

Rock Springs

Southwest Wyoming Regional Airport

Codeshare

Sacramento

Sacramento International Airport

Salt Lake City

Salt Lake City International Airport

Codeshare

San Antonio

San Antonio International Airport

San Diego

San Diego International Airport

San Francisco

San Francisco International Airport

San Jose

Norman Y. Mineta San Jose International Airport

Santa Ana

John Wayne Orange County International Airport

Santa Barbara

Santa Barbara Municipal Airport

Codeshare

Santa Fe

Santa Fe Municipal Airport

Codeshare

Seattle

Seattle–Tacoma International Airport

Shreveport

Shreveport Regional Airport

Codeshare

Sioux Falls

Sioux Falls Regional Airport

Codeshare

Spokane

Spokane International Airport

Springfield

Springfield Branson National Airport

Codeshare

St George

St George Regional Airport

Codeshare

St Louis

St. Louis Lambert International Airport

Codeshare

Tampa

Tampa International Airport

Tucson

Tucson International Airport

Codeshare

Tulsa

Tulsa International Airport

Codeshare

Washington

Ronald Reagan Washington National Airport

Wichita

Wichita Dwight D. Eisenhower National Airport

Williston

Sloulin Field International Airport

Codeshare