Positions and flown trails from open ADS-B broadcasts (adsb.lol), matched against United Airlines's FAA-registered airframes — mainline fleet only, updated every 30 seconds. Trails colored by altitude.
Every United Airlines nonstop route in our tracked network — hubs in orange. Download this map — free to reuse with a link back to this page.
Scope: our route data covers 500 tracked origin airports, so this shows routes touching those airports. For large carriers that is close to the whole network; for regional carriers it may be partial.
The longest United Airlines nonstop in our data is Singapore (SIN) to San Francisco (SFO) at 8,439 miles — roughly 16h 39m in the air (estimated from distance). The shortest is Chicago (ORD) to Milwaukee (MKE) at 67 miles.
1,196 aircraft are US-registered with United Airlines as the registrant, averaging 16.9 years old.
| Aircraft | Jets | Avg age |
|---|---|---|
| Boeing 737-900ER | 136 | 13.5y |
| Boeing 737-800 | 131 | 22.4y |
| E175 | 97 | 9.5y |
| ERJ145 | 82 | 22.1y |
| A320 | 80 | 26.8y |
| 737 MAX 9 | 78 | 3.7y |
| Boeing 777-200 | 73 | 27y |
| 737 MAX 8 | 67 | 2.7y |
| A321neo | 61 | 1.4y |
| A319 | 59 | 26.2y |
| 15 smaller types | 332 | — |
Source: FAA aircraft registry (public domain, updated daily). Counts aircraft registered directly to the airline — leased airframes registered to trustee banks are not attributable, so treat these as floors, not exact fleet sizes.
In 2025, United Airlines reported 146,214,658 passengers on 1,012,639 flights to the US DOT — an average of 144 passengers per flight at 81% seat fill. We estimate those flights emitted ~19,887 thousand tonnes of CO₂ — about 114 g per passenger-mile.
| Aircraft | Flights | Avg passengers | Seat fill | Miles flown | CO₂ (est.) | g CO₂/pax-mi |
|---|---|---|---|---|---|---|
| Boeing 737-800 | 156,149 | 133 | 80% | 152M | 2,299k t | 114 |
| Boeing 737-900ER | 151,916 | 146 | 82% | 169M | 2,670k t | 108 |
| Boeing B737 Max 800 | 142,641 | 134 | 81% | 201M | 2,539k t | 95 |
| Boeing B737 Max 900 | 116,574 | 147 | 82% | 165M | 2,191k t | 90 |
| Airbus Industrie A319 | 99,902 | 103 | 81% | 76M | 1,039k t | 132 |
| Airbus Industrie A320-100/200 | 85,121 | 119 | 79% | 71M | 1,057k t | 125 |
| Boeing 737-700/700LR/Max 7 | 47,772 | 102 | 81% | 42M | 487k t | 115 |
| Airbus Industrie A321-200n | 44,962 | 168 | 84% | 55M | 920k t | 100 |
| Boeing 777-200ER/200LR/233LR | 38,834 | 256 | 83% | 154M | 5,296k t | 135 |
| Boeing 757-200 | 28,019 | 148 | 84% | 65M | 1,389k t | 145 |
Source: US DOT T-100 segment reports, 2025, scheduled service. Mainline operations only — regional partners report separately. CO₂ is an estimate: miles flown × a representative fuel-burn factor per aircraft family × 3.16 kg CO₂ per kg of jet fuel (±15%; factors cover 75% of reported miles — types without a published factor are excluded — see the jet tracker methodology).
Checking today's departures at United Airlines's busiest airports…
Abilene (ABI) · Acapulco (ACA) · Aguadilla (BQN) · Aguascalientes (AGU) · Akron (CAK) · Albany (ALB) · Albuquerque (ABQ) · Alexandria (AEX) · Allentown (ABE) · Amarillo (AMA) · Anchorage (ANC) · Antigua (ANU) · Appleton (ATW) · Arcata CA (ACV) · Asheville (AVL) · Aspen (ASE) · Atlanta (ATL) · Austin (AUS) · Bakersfield (BFL) · Baltimore (BWI) · Bangor (BGR) · Basse Terre (SKB) · Baton Rouge (BTR) · Belize City (BZE) · Bentonville (XNA) · Bermuda (BDA) · Billings (BIL) · Birmingham (BHM) · Bishop (BIH) · Bismarck (BIS) · Boise (BOI) · Boston (BOS) · Bozeman (BZN) · Bridgetown (BGI) · Brownsville (BRO) · Buffalo (BUF) · Burbank (BUR) · Burlington (BTV) · Butte (BTM) · Calgary (YYC) · Cancun (CUN) · Carlsbad (CLD) · Casper (CPR) · Cedar Rapids (CID) · Charleston (CHS) · Charleston (CRW) · Charlotte (CLT) · Charlottesville VA (CHO) · Chattanooga (CHA) · Cheyenne (CYS) · Chicago (ORD) · Cincinnati (CVG) · Clarksburg (CKB) · Cleveland (CLE) · Cody (COD) · Colorado Springs (COS) · Columbia (CAE) · Columbia (COU) · Columbus (CMH) · Comayagua (XPL) · Corpus Christi (CRP) · Cozumel (CZM) · Dallas-Fort Worth (DFW) · Dayton (DAY) · Decatur (DEC) · Del Bajio (BJX) · Denver (DEN) · Des Moines (DSM) · Detroit (DTW) · Devils Lake (DVL) · Dickinson (DIK) · Dodge City (DDC) · Duluth (DLH) · Durango (DRO) · Eau Claire (EAU) · Edmonton (YEG) · El Paso (ELP) · Eugene (EUG) · Fairbanks (FAI) · Fargo (FAR) · Farmington (FMN) · Flint (FNT) · Fort Dodge (FOD) · Fort Lauderdale (FLL) · Fort Myers (RSW) · Fort Wayne (FWA) · Fresno (FAT) · Georgetown (GCM) · Gillette (GCC) · Godthaab (GOH) · Grand Junction (GJT) · Grand Rapids (GRR) · Great Falls (GTF) · Green Bay (GRB) · Greensboro (GSO) · Greenville (GSP) · Guadalajara (GDL) · Guatemala City (GUA) · Gulfport (GPT) · Gunnison (GUC) · Hailey (SUN) · Halifax (YHZ) · Hancock (CMX) · Harlingen (HRL) · Harrisburg (MDT) · Hattiesburg/Laurel (PIB) · Hayden (HDN) · Hays (HYS) · Helena (HLN) · Hewandorra (UVF) · Hilton Head Island (HHH) · Hobbs (HOB) · Honolulu (HNL) · Houston (IAH) · Huntsville (HSV) · Idaho Falls (IDA) · Indianapolis (IND) · Ithaca (ITH) · Jacksn Hole (JAC) · Jackson (JAN) · Jacksonville (JAX) · Jamestown (JMS) · Johnstown (JST) · Joplin (JLN) · Kahului (OGG) · Kalispell (FCA) · Kansas City (MCI) · Key West (EYW) · Knoxville (TYS) · Kona (KOA) · Kralendijk (BON) · Lafayette (LAF) · Lafayette (LFT) · Lake Charles (LCH) · Lancaster (LNS) · Laramie (LAR) · Laredo (LRD) · Las Vegas (LAS) · Lexington KY (LEX) · Liberal (LBL) · Liberia (LIR) · Lihue (LIH) · Lincoln (LNK) · Little Rock (LIT) · Los Angeles (LAX) · Louisville (SDF) · Lubbock (LBB) · Lynchburg (LYH) · MONTGOMERY (MGM) · Madison (MSN) · Managua (MGA) · Manchester NH (MHT) · Mason City (MCW) · Mazatlan (MZT) · Mcallen (MFE) · Medford (MFR) · Melbourne (MLB) · Memphis (MEM) · Merida (MID) · Meridian (MEI) · Mexico City (MEX) · Miami (MIA) · Midland (MAF) · Milwaukee (MKE) · Minneapolis (MSP) · Minot (MOT) · Missoula (MSO) · Mobile (MOB) · Moline (MLI) · Montego Bay (MBJ) · Monterey (MRY) · Monterrey (MTY) · Montreal (YUL) · Montrose CO (MTJ) · Morgantown (MGW) · Myrtle Beach (MYR) · Nantucket (ACK) · Nashville (BNA) · Nassau (NAS) · New Orleans (MSY) · New York (LGA) · Newark (EWR) · Newburgh (SWF) · Norfolk (ORF) · North Bend (OTH) · North Platte (LBF) · Oaxaca (OAX) · Oklahoma City (OKC) · Omaha (OMA) · Ontario (ONT) · Oranjestad (AUA) · Orlando (MCO) · Ottawa (YOW) · PADUCAH (PAH) · Palm Springs (PSP) · Panama City (ECP) · Panama City (PTY) · Pasco (PSC) · Pellston (PLN) · Pensacola (PNS) · Peoria (PIA) · Philadelphia (PHL) · Philipsburg (SXM) · Phoenix (PHX) · Pierre (PIR) · Pittsburgh (PIT) · Port-of-spain (POS) · Portland (PDX) · Portland (PWM) · Prescott (PRC) · Providence (PVD) · Providenciales (PLS) · Puebla (PBC) · Puerto Escondido (PXM) · Puerto Plata (POP) · Puerto Vallarta (PVR) · Punta Cana (PUJ) · Quebec (YQB) · Queretaro (QRO) · Raleigh-durham (RDU) · Rapid City (RAP) · Redding (RDD) · Redmond-Bend (RDM) · Regina (YQR) · Reno (RNO) · Rhinelander (RHI) · Richmond (RIC) · Riverton WY (RIW) · Roanoke VA (ROA) · Roatan (RTB) · Rochester (ROC) · Rock Springs (RKS) · Roswell (ROW) · Sacramento (SMF) · Saginaw (MBS) · Saint George (SGU) · Salina (SLN) · Salt Lake City (SLC) · San Antonio (SAT) · San Diego (SAN) · San Francisco (SFO) · San Jose (SJC) · San Jose (SJO) · San Jose Del Cabo (SJD) · San Juan (SJU) · San Luis Obispo (SBP) · San Luis Potosi (SLP) · San Pedro Sula (SAP) · San Salvador (SAL) · Santa Ana (SNA) · Santa Barbara (SBA) · Santa Fe (SAF) · Santiago (STI) · Santo Domingo (SDQ) · Sarasota (SRQ) · Sault Ste Marie (CIU) · Savannah (SAV) · Scottsbluff (BFF) · Scranton (AVP) · Seattle (SEA) · Sheridan (SHR) · Shreveport (SHV) · Sioux City (SUX) · Sioux Falls (FSD) · South Bend (SBN) · Spokane (GEG) · Springfield (SGF) · St. Louis (STL) · St. Thomas (STT) · State College Pennsylvania (SCE) · Syracuse (SYR) · Tampa (TPA) · Tampico (TAM) · Tepic (TPQ) · Toronto (YYZ) · Traverse City (TVC) · Tucson (TUS) · Tulsa (TUL) · Tulum (TQO) · Vail (EGE) · Vancouver (YVR) · Vera Cruz (VER) · Victoria (VCT) · Washington (IAD) · Washington (DCA) · Watertown (ATY) · West Palm Beach (PBI) · West Yellowstone (WYS) · Wichita (ICT) · Willemstad (CUR) · Wilmington (ILM) · Windsor Locks (BDL) · Winnipeg (YWG) · Zihuatanejo (ZIH)
Amsterdam (AMS) · Athens (ATH) · Barcelona (BCN) · Bari (BRI) · Bilbao (BIO) · Brussels (BRU) · Dublin (DUB) · Dubrovnik (DBV) · Edinburgh (EDI) · Faro (FAO) · Frankfurt (FRA) · Funchal (FNC) · Geneva (GVA) · Glasgow (GLA) · Keflavik (KEF) · Lisbon (LIS) · London (LHR) · Madrid (MAD) · Malaga (AGP) · Milano (MXP) · Munich (MUC) · Naples (NAP) · Nice (NCE) · Palermo (PMO) · Palma de Mallorca (PMI) · Paris (CDG) · Ponta Delgada (PDL) · Porto (OPO) · Rome (FCO) · Santiago (SCQ) · Shannon (SNN) · Split (SPU) · Venice (VCE) · Zurich (ZRH)
Bangkok (BKK) · Beijing (PEK) · Cebu (CEB) · Delhi (DEL) · Ho Chi Minh City (SGN) · Hong Kong (HKG) · Kaohsiung (KHH) · Manila (MNL) · Nagoya (NGO) · Osaka (KIX) · Seoul (ICN) · Shanghai (PVG) · Singapore (SIN) · Taipei (TPE) · Tokyo (HND) · Tokyo (NRT)
Agana (GUM) · Auckland (AKL) · Babelthuap (ROR) · Brisbane (BNE) · Majuro (MAJ) · Melbourne (MEL) · Papeete (PPT) · Saipan (SPN) · Sydney (SYD)
Bogota (BOG) · Buenos Aires (EZE) · Georgetown (GEO) · Lima (LIM) · Quito (UIO) · Rio De Janeiro (GIG) · Rio Negro (MDE) · Sao Paulo (GRU)
Accra (ACC) · Cape Town (CPT) · Johannesburg (JNB) · Lagos (LOS)
United Airlines flies 1,622 nonstop routes touching 365 airports in 65 countries within our tracked network of 500 origin airports. Its busiest bases are Chicago (ORD), Denver (DEN), Houston (IAH).
Singapore (SIN) to San Francisco (SFO) — about 8,439 miles, roughly 16h 39m in the air (estimated from distance).
By nonstop routes in our data: Chicago (ORD) with 199, Denver (DEN) with 194, Houston (IAH) with 169, Newark (EWR) with 149, Washington (IAD) with 119.
Aircraft types we have observed on United Airlines routes include the Embraer 175, Boeing 737, Boeing 737-900, Bombardier CRJ, Boeing 737-800. This reflects our schedule sample, not the full fleet.
