
Washington Dulles International Airport is located 26 miles west of downtown Washington, D.C., in Loudoun and Fairfax counties in Northern Virginia. The airport is accessible via the Dulles Access Road/Dulles Greenway (State Route 267) and State Route 28. The Dulles Access Road is a toll-free, limited-access highway that facilitates car access to the airport from the Capital Beltway and Interstate 66. While travelling to the airport using I-66, it is important to note that E-ZPass is required during rush hours. Additionally, I-66 has dynamic rush-hour tolling for non-HOV traffic between the Capital Beltway (I-495) and U.S. 29 in Rosslyn, Virginia. To avoid tolls and traffic, some travellers opt for alternative routes such as U.S. 50 from DC/Roosevelt Bridge to I-495 northbound or the GW Parkway to I-495 southbound.
| Characteristics | Values |
|---|---|
| Dulles Airport traffic exemption from highway's HOV rules | No longer exempted |
| Hours of Operation | I-66 Express Lanes Inside the Beltway |
| Traffic from Washington, D.C. to Dulles | Moves Westbound |
| Traffic from Dulles to Washington, D.C. | Moves Eastbound |
| Lanes | Free with no tolling or HOV requirement at all other times |
| E-ZPass | Required during rush hours |
| E-ZPass Flex | No toll payment with two or more people in the vehicle |
| Alternate routes | U.S. 50 from DC/Roosevelt Bridge to I-495 northbound |
| GW Parkway to exit onto I-495 southbound | |
| Dulles Access Road/Dulles Greenway (State Route 267) | |
| State Route 28 |
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What You'll Learn
- Dulles Airport traffic is no longer exempt from I-66 highway's HOV rules
- The Dulles Access Road is toll-free and restricted to airport-bound vehicles
- The Dulles Toll Road is a parallel set of toll lanes for non-airport traffic
- Route suggestions to reach Dulles Airport from the south on I-66
- E-ZPass is required during rush hours, including for Dulles Airport traffic

Dulles Airport traffic is no longer exempt from I-66 highway's HOV rules
The Virginia Department of Transportation has implemented dynamic rush-hour tolling for non-HOV traffic on a nine-mile stretch of I-66 between the Capital Beltway (I-495) and US 29 in Rosslyn, Virginia. This means that Dulles Airport traffic is no longer exempt from the highway's HOV rules, as it was in the past.
The Dulles Access Road, a toll-free, limited-access highway owned by the Metropolitan Washington Airports Authority, provides access to the airport from the Capital Beltway and Interstate 66. This road is restricted to vehicles travelling to and from Dulles Airport and typically experiences less traffic.
When travelling to the airport from the DC area, drivers will encounter rush-hour traffic until they reach the Dulles Access Road. An alternative route to avoid tolls and traffic is to take US 50 from DC/Roosevelt Bridge to I-495 northbound and then exit onto the Dulles Access Road. The GW Parkway can also be taken to exit onto I-495 southbound, which is a longer but potentially faster route during rush hour due to the lack of traffic signals.
For those travelling without an EZPass, it is recommended to use an alternative route, such as the Metro Silver Line or the Metro Bus 5A from Rosslyn to IAD. These options can help individuals avoid the potential costs and traffic associated with driving on I-66 during peak hours.
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The Dulles Access Road is toll-free and restricted to airport-bound vehicles
Washington Dulles International Airport is accessible via the Dulles Access Road (State Route 267) and State Route 28. The Dulles Access Road is a toll-free, limited-access highway owned by the Metropolitan Washington Airports Authority (MWAA). It was built to facilitate car access to Washington Dulles from the Capital Beltway and Interstate 66.
The Dulles Access Road is toll-free in both directions when travelling to and from the airport. However, non-airport traffic between Washington and Reston became heavy after the road opened, so a parallel set of toll lanes (the Dulles Toll Road) were added to accommodate non-airport traffic. The airport-only lanes remain less congested and toll-free.
The Dulles Access Road is restricted to vehicles travelling to and from Dulles Airport and does not encounter much traffic. Travellers can access the road by taking the left exit from I-495 northbound, or by taking the GW Parkway and exiting onto I-495 southbound. This route is longer in terms of mileage but has no traffic signals, so it takes about the same amount of time during rush hour.
Travellers can also access the airport via I-66. However, an E-ZPass is required during rush hours, including for Dulles Airport traffic. When I-66 tolling is active, drivers with an E-ZPass Flex can claim no toll payment if two or more people are in the vehicle and the transponder is switched to HOV mode. Without an E-ZPass, travellers are advised to take an alternate route or use Metrorail.
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The Dulles Toll Road is a parallel set of toll lanes for non-airport traffic
Washington Dulles International Airport is accessible via the Dulles Access Road/Dulles Greenway (State Route 267) and State Route 28. The Dulles Access Road is a toll-free, limited-access highway owned by the Metropolitan Washington Airports Authority (MWAA). It was built to facilitate car access to Washington Dulles from the Capital Beltway and Interstate 66. The Access Road is exclusively used for entering and exiting Dulles Airport, with no general-access exits or entrances. It is free to use, and there are gated slip ramps for buses and emergency vehicles.
The Dulles Toll Road is an eight-lane, 16.15-mile (25.99 km) toll road. It was built in 1984 by the Virginia Department of Transportation (VDOT) as a toll highway due to a lack of conventional funding. In 2006, the MWAA took over the operation of the Dulles Toll Road from VDOT, assuming associated debts and committing to building a rapid transit line in the median. The MWAA also operates the Dulles Access Road and is responsible for the construction of the Silver Line down its median.
Motorists exiting onto State Route 267 towards Dulles Airport must choose between lanes marked "Airport Traffic Only" and "To All Local Exits". The "Airport Traffic Only" lanes lead to the westbound lanes of the Access Road, while the "To All Local Exits" lanes provide access to the Dulles Toll Road. It is illegal to use the Access Road without conducting "airport business", and drivers can receive fines and license violations for doing so. However, some commuters may evade tolls and traffic on the Toll Road by using the Access Road and then "backtracking" to their exit. To address this issue, VDOT previously issued special stickers allowing commuters to backtrack legally along the access highway for a fee, but this programme has since been discontinued.
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Route suggestions to reach Dulles Airport from the south on I-66
Washington Dulles International Airport is located 26 miles west of downtown Washington, D.C., in Loudoun and Fairfax counties in Northern Virginia. The airport is accessible via the Dulles Access Road/Dulles Greenway (State Route 267) and State Route 28. The Dulles Access Road is a toll-free, limited-access highway owned by the Metropolitan Washington Airports Authority (MWAA) that facilitates car access to the airport from the Capital Beltway and Interstate 66.
- If you are coming from the D.C. area, you will likely encounter rush-hour traffic until you reach the Dulles Access Road, which is restricted to vehicles heading to the airport and typically experiences less congestion.
- Take I-66 west to exit 67 (VA-267 W - Dulles Airport/I-495 N/Baltimore). Follow the signs to the airport, which is approximately 16 miles from exit 67.
- To avoid potential traffic delays, consider checking 511Virginia.org or dialling 511 on your cell phone to get the latest information about road conditions and incidents before starting your journey.
- An alternative route is to take I-29 north and then get on Route 28 east towards Manassas. Just before Manassas, take the Route 234 Bypass north to I-66, and head east on I-66 to Route 28 again. From there, take Route 28 north to Dulles Airport. This route may be smoother as you will be going against the typical traffic flow. However, avoid connecting with I-66 in Gainesville due to ongoing road construction projects.
- Plan for potential delays, especially during peak travel times or when navigating through busier areas such as Chantilly. Allow for some flexibility in your schedule to account for any minor delays or unexpected slow traffic.
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E-ZPass is required during rush hours, including for Dulles Airport traffic
The Dulles Toll Road has one High Occupancy Vehicle (HOV) lane in each direction. HOV-2 restrictions are in effect during weekday rush hours in the left travel lane. Motorcycles and clean fuel vehicles are exempt from HOV restrictions in Virginia. The Virginia Department of Transportation has activated dynamic rush-hour tolling for non-HOV traffic along nine miles of I-66 between the Capital Beltway (I-495) and U.S. 29 in Rosslyn, Virginia. Dulles Airport traffic is no longer exempt from the highway's HOV rules. When I-66 tolling is active, E-ZPass will be required in the vehicle.
E-ZPass electronic transponders are accepted along the Dulles Toll Road to speed up the collection of tolls while keeping traffic moving. E-ZPass is not administered by the Dulles Toll Road or the Metropolitan Washington Airports Authority. The Dulles Airport Access Highway is free of charge for traffic heading to or from Dulles International Airport. The Access Road is a toll-free, limited-access highway owned by the Metropolitan Washington Airports Authority (MWAA) to facilitate car access to Washington Dulles from the Capital Beltway and Interstate 66.
Drivers with E-ZPass Flex can claim no toll payment on I-66 if two or more people are in the vehicle and the transponder is switched to HOV mode. If your vehicle does not have E-ZPass, or you do not wish to pay the toll, consider travelling during off-peak hours, selecting an alternate route, or using Metrorail. To get to Dulles Airport, you can take Route 29 north and get on Route 28 east towards Manassas. Just before Manassas, get onto Route 234 Bypass north to 66, and head east to Route 28 again, then take north to Dulles Airport. You will be going against traffic and shouldn't encounter any problems.
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Frequently asked questions
The best route to Dulles Airport is by taking 267 West. It is free when going to and coming from the airport, and there are signs to follow.
An alternative route is to take U.S. 50 from DC/Roosevelt Bridge to I-495 northbound, then take the left exit onto the Dulles Access Road. Another option is to take the GW Parkway and exit onto I-495 southbound.
Yes, route 66 is an option to get to Dulles Airport. However, it is a dynamic rolling toll road, so be mindful of the costs. If you have three or more people in the car, you can use the EZ Pass for free.
To avoid tolls on route 66, consider travelling during off-peak hours, choose an alternative route, or use the Metrorail.
















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