Dulles

IAD · KIAD

Washington Dulles International Airport

38.94°, -77.46°VA, United States

Passengers a year

27.6M

#22 busiest in the U.S.

166

nonstop destinations

113

airlines

347

departures a day

82.8%

arrivals on time

1.4%

flights cancelled

81.3%

load factor

The ten busiest routes from IAD, by passengers: DEN, SFO, ATL, LHR, LAX, MCO, SAL, FRA, ORD, SEAIADDENSEAORDLHRFRAMCOSALATLLAXSFO
Nonstop routes — the ten busiest. Filed traffic, June 2025 – May 2026.

Airlines

United Airlines is the largest carrier at Dulles, with 67% of all passengers. 113 airlines fly from here.

Share of passengers · each carrier as a slice of the whole airport

United Airlines holds 67% of the airport — the 11th most concentrated of 30 large hubs. The nearest comparison is PHL at 67%.

AirlineSharePassengersSeats YoY
UA
United83% fullUnited Express · operated by CommuteAir, Republic, Mesa, GoJet, SkyWest
66.6%18.4M+2.6%
DL
Delta79% fullDelta Connection · operated by SkyWest, Endeavor, Republic
3.6%988.8K-3.4%
F9
Frontier75% full
1.8%502.4K+204.1%
AA
American81% fullAmerican Eagle · operated by PSA, Republic, SkyWest
1.7%481.7K+8.2%
LH
Lufthansa81% full
1.7%460.6K+2.5%
+Other airlines
24.6%6.8M—

Share, passengers and destinations count each airline’s own flights plus the regional flying sold under its brand. On-time covers the airline's own aircraft only — regional affiliates report to the government separately. Seats year on year compares the latest twelve months against the twelve before them.

Destinations

104 domestic and 62 international nonstop destinations from Dulles, across 51 countries.

63% domestic · 37% international · by departing passengers

Top domestic destinations

  • Denver (DEN)

    595.4K departing · 85% full

    United Airlines · Southwest Airlines

  • San Francisco (SFO)

    476.8K departing · 84% full

    United Airlines · Alaska Airlines

  • Atlanta (ATL)

    455.6K departing · 77% full

    Delta Air Lines · United Airlines · Frontier Airlines

  • Los Angeles (LAX)

    407.8K departing · 86% full

    United Airlines · Alaska Airlines

  • Orlando (MCO)

    332.8K departing · 85% full

    United Airlines · Frontier Airlines

  • Chicago (ORD)

    290.4K departing · 80% full

    United Airlines

  • Seattle (SEA)

    271.9K departing · 86% full

    Alaska Airlines · United Airlines · Delta Air Lines

  • Houston (IAH)

    262.1K departing · 84% full

    United Airlines

  • Dallas-Fort Worth (DFW)

    257.6K departing · 84% full

    American Airlines · United Airlines · Frontier Airlines

  • Boston (BOS)

    222.1K departing · 88% full

    United Airlines

Top international destinations

  • London, United Kingdom (LHR)

    414.6K departing · 817.5K both ways

    British Airways · United Airlines · Virgin Atlantic

  • San Salvador, El Salvador (SAL)

    330.7K departing · 643.6K both ways

    Avianca El Salvador · Volaris El Salvador · United Airlines · Avianca Costa Rica

  • Frankfurt am Main, Germany (FRA)

    318.3K departing · 629.7K both ways

    United Airlines · Lufthansa

  • Paris, France (CDG)

    256.8K departing · 502.4K both ways

    Air France · United Airlines

  • Istanbul, Turkey (IST)

    178.2K departing · 357.8K both ways

    Turkish Airlines

  • Tocumen, Panama (PTY)

    169K departing · 329.9K both ways

    Copa Airlines

  • Munich, Germany (MUC)

    168.8K departing · 336.3K both ways

    Lufthansa · United Airlines

  • Dublin, Ireland (DUB)

    153.7K departing · 308.6K both ways

    Aer Lingus · United Airlines

  • Doha, Qatar (DOH)

    145.4K departing · 288.8K both ways

    Qatar Airways

  • Lisbon, Portugal (LIS)

    144.2K departing · 288.3K both ways

    TAP-TAP Air Portugal · United Airlines

All nonstop destinations

166 nonstop · 48 airlines · 104 domestic / 62 intl

ACCAccraABQAlbuquerqueAMSAmsterdamANCAnchorageATLAtlantaAUSAustinBCNBarcelonaBOSBostonBZNBozemanBGIBridgetownBTVBurlingtonYYCCalgaryCUNCancúnCPTCape TownCHSCharlestonCLTCharlotteSTTCharlotte AmalieORDChicagoCVGCincinnati / CovingtonCLEClevelandCMHColumbusDSSDakarDFWDallas-Fort WorthDENDenverDTWDetroitDUBDublinEGEEagleEDIEdinburghFLLFort LauderdaleRSWFort MyersFRAFrankfurt am MainGVAGenevaGCMGeorge TownGUAGuatemala CityBDLHartfordHDNHaydenHNLHonolulu, OahuIAHHoustonINDIndianapolisJACJacksonJAXJacksonvilleMCIKansas CityLOSLagosLASLas VegasLISLisbonLHRLondonLAXLos AngelesMADMadridMEXMexico CityMIAMiamiMSPMinneapolisMBJMontego BayMUCMunichBNANashvilleNASNassauMSYNew OrleansLGANew YorkEWRNewarkNCENice, Alpes-MaritimesORFNorfolkAUAOranjestadMCOOrlandoPSPPalm SpringsCDGParisPHXPhoenixPITPittsburghPDXPortlandPWMPortlandPLSProvidencialesPUJPunta CanaRDURaleigh/DurhamROCRochesterFCORomeSMFSacramentoSLCSalt Lake CitySATSan AntonioSANSan DiegoSFOSan FranciscoSJOSan JoséSJUSan JuanSALSan SalvadorGRUSão PauloSAVSavannahSEASeattleSXMSint MaartenATHSpata-ArtemidaSYRSyracuseTPATampaTLVTel AvivHNDTokyoTVCTraverse CityYVRVancouverVCEVeneziaDCAWashingtonPBIWest Palm BeachBRUZaventemZRHZurich

United Express · operated by CommuteAir, GoJet Airlines, Mesa Airlines, Republic Airways, SkyWest Airlines

ALBAlbanyCKBBridgeportBUFBuffaloCHOCharlottesvilleCAEColumbiaDAYDaytonGSOGreensboroGSPGreenville/Greer/SpartanburgMDTHarrisburgHSVHuntsvilleITHIthacaJSTJohnstownEYWKey WestTYSKnoxville/MaryvilleSDFLouisvilleLYHLynchburgMHTManchesterMOBMobileMGWMorgantownMYRMyrtle BeachYOWOttawaPHLPhiladelphiaPVDProvidence/WarwickRICRichmondROARoanokeSBNSouth BendSTLSt LouisSCEState CollegeAVPWilkes-Barre/Scranton

United Airlines profile

Aircraft

By share of departures at Dulles.

Body class · share of departures

When Dulles is busiest

Departures by month over the trailing year. Bars scale to the busiest month.

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Jan

Feb

Mar

Apr

May

Departures a month · peak June 2025

Annual passengers since 1990

Total passengers, arriving and departing, in every year on record.

Passengers a year

Every year
1990
10,029,535
1991
10,486,009
1992
10,130,686
1993
9,183,600
1994
9,655,162
1995
10,478,409
1996
11,014,021
1997
11,652,289
1998
12,576,153
1999
15,638,263
2000
15,778,621
2001
13,905,584
2002
14,274,119
2003
16,406,977
2004
22,185,643
2005
26,340,927
2006
22,454,287
2007
23,992,335
2008
23,170,346
2009
22,556,923
2010
22,949,572
2011
22,473,122
2012
21,859,587
2013
21,347,225
2014
20,993,348
2015
20,970,412
2016
21,355,323
2017
22,233,443
2018
23,493,221
2019
24,019,866
2020
7,892,355
2021
14,527,504
2022
20,698,191
2023
24,472,462
2024
26,497,286
2025
27,932,034
2026
10,511,343 so far

Arriving on time

Of every 100 flights landing at Dulles, 83 touch down within 15 minutes of schedule, 16 arrive late, and 1 is cancelled.

See live FAA delays

Every 100 arrivals

On time 83Late 16Cancelled 1

14 min

average delay

804

flights cancelled

56.8K

arrivals measured

What holds flights up

Share of delay minutes

Most reliable here

Republic Airways 84.8%

Least reliable here

Southwest Airlines 67.9%

Among US airports

#22

On time, month by month

Darker is better · 71.2%–88.9%

The weak spot is July 2025, when 71.2% of arrivals landed on time — 11.6 points below the year. The strongest was April 2026 at 88.9%.

Frequently asked

How busy is Washington Dulles International Airport (IAD)?

Washington Dulles International Airport handled about 27.6M passengers over the trailing 12 months, ranking #22 among U.S. airports by passengers, with roughly 347 departures a day.

Which airline is the largest at Washington Dulles International Airport (IAD)?

United Airlines is the largest carrier at Dulles (IAD), flying about 67% of its passengers. 113 airlines serve Dulles in total.

How many places can you fly nonstop from Washington Dulles International Airport (IAD)?

Dulles (IAD) has 166 nonstop destinations — 104 domestic and 62 international across 51 countries.

How often do flights arrive on time at Washington Dulles International Airport (IAD)?

About 82.8% of flights arriving at Dulles (IAD) touch down within 15 minutes of schedule, per US DOT figures. About 1.4% are cancelled.

What aircraft flies most from Washington Dulles International Airport (IAD)?

The Embraer E175 flew the largest share of departures from Dulles (IAD), about 15% of the total.

Trip reports on YouTube

Fliers post trip reports from flights through Dulles (IAD) to YouTube. These three were matched automatically from public YouTube listings — The Frequent Flier does not host, review, or endorse them.

  • Genki's Travels

    Korean Air | B777-300ER | Business Class | Seoul (ICN) to Washington DC (IAD) | Trip Report

    35:56 · May 2026

    Watch on YouTube

  • Jviation

    Is This One of the BEST Transatlantic Economy Seats? United 767-300ER Trip Report | AMS-IAD

    14:46 · Apr 2025

    Watch on YouTube

  • QFS Aviation

    TRIP REPORT | Delta Airlines - MD 88 - Atlanta (ATL) to Washington DC (IAD) | Economy

    17:11 · Jul 2020

    Watch on YouTube

Source: YouTube. Titles, thumbnails, and channel names come from YouTube. Playing a video loads the YouTube player, and using it means you agree to the YouTube Terms of Service; the Google Privacy Policy applies.

Departing counts passengers leaving Dulles; international destinations also show both directions. Data: traffic June 2025 – May 2026, on-time July 2025 – June 2026. Source: US DOT Bureau of Transportation Statistics (T-100 Segment, On-Time Performance).