Getting Around the US: Domestic Flights & Airport Guide

The United States operates the largest domestic aviation network on earth with approximately 5,000 public airports and over 45,000 daily commercial flights connecting cities across 3.8 million square miles. Delta, American Airlines, United, and Southwest control roughly 80 percent of domestic passenger traffic. Distance makes flying the primary method for crossing multiple regions—Los Angeles to New York City covers 2,451 miles and requires minimum five hours airborne, while driving the same route takes approximately 41 hours of continuous road time. Regional carriers and ultra-low-cost airlines including Spirit, Frontier, and Allegiant operate point-to-point networks serving secondary cities with base fares frequently below $100 but charging separately for baggage, seat selection, and onboard refreshments. TSA PreCheck expedites domestic security screening at 200-plus airports for enrolled travelers.

Interstate highways form a 48,440-mile network connecting all states except Alaska and Hawaii. The system originated with the Federal Aid Highway Act signed in 1956 and uses even numbers for east-west routes and odd numbers for north-south routes. I-95 runs 1,908 miles along the Atlantic coast from Miami to the Canadian border near Houlton, Maine. I-10 stretches 2,460 miles from Santa Monica, California to Jacksonville, Florida as the southernmost transcontinental route. I-90 covers 3,021 miles from Seattle to Boston as the longest interstate. Rental cars are available in every major city through national chains—Enterprise, Hertz, Avis, Budget—with daily rates varying from $30 to over $200 depending on vehicle class, location, and season. Gas stations appear at frequent intervals on interstate corridors. Speed limits range from 55 to 85 miles per hour depending on state and road type, with Texas State Highway 130 posting the highest limit at 85. Right turns on red lights are permitted after stopping in most states unless posted otherwise.

Amtrak operates the national passenger rail system with approximately 500 destinations across 46 states on 21,400 miles of track, nearly all of which is freight-owned requiring Amtrak trains to yield to cargo traffic. The Northeast Corridor between Washington, D.C. and Boston represents the sole high-frequency competitive route where Acela trains reach 150 miles per hour on limited segments and complete the 226-mile New York to Washington run in approximately two hours and 45 minutes. Long-distance routes including the California Zephyr from Chicago to San Francisco, the Empire Builder from Chicago to Seattle, and the Coast Starlight from Los Angeles to Seattle operate daily but face chronic delays—the California Zephyr covers 2,438 miles in a scheduled 51 hours though actual times frequently exceed 60 hours. Sleeper compartments, dining cars, and observation lounges distinguish long-distance trains from commuter service. Advance booking reduces fares substantially on most routes.

Public transportation quality and coverage vary drastically by metropolitan region. New York City operates the largest subway system with 472 stations across four boroughs on 665 miles of track carrying approximately 3.6 million riders on an average weekday before the pandemic. The Metropolitan Transportation Authority runs subways, buses, and commuter rail throughout the New York metropolitan area with a single-ride subway fare of $2.75 and unlimited weekly passes available. Washington, D.C. Metro serves 98 stations across Maryland, Virginia, and the District with trains running as frequently as every two minutes during peak periods on six color-coded lines. Chicago Transit Authority operates eight elevated and subway lines forming the 'L' system with 145 stations. San Francisco Bay Area Rapid Transit connects 50 stations across four counties with service to San Francisco International Airport. Los Angeles Metro Rail operates six lines totaling 109 miles but covers only a fraction of the 4,850-square-mile Los Angeles metropolitan area, making personal vehicles essential for most movement. Boston's MBTA includes subway, light rail, commuter rail, bus, and ferry service dating to 1897 as the first subway system in the nation. Smaller cities including Denver, Seattle, Portland, and Phoenix have built light rail networks since 1980.

Buses provide intercity connections through Greyhound, Megabus, FlixBus, and regional operators. Greyhound maintains the largest network with approximately 2,400 destinations and 13,000 daily departures before pandemic reductions. A New York to Los Angeles route operates daily covering approximately 2,800 miles in roughly 66 hours with multiple stops and driver changes. Curbside bus operators including BoltBus and Megabus pioneered reserved online ticketing and competitive pricing on high-traffic corridors—New York to Washington, D.C. or Boston routes sometimes list for $1 during promotional periods though typical fares range from $15 to $50. Regional operations including Peter Pan, Concord Coach, and Jefferson Lines fill gaps in areas without frequent Amtrak service.

Ride-hailing through Uber and Lyft has supplanted traditional taxi service in most cities since 2012. Both apps operate in hundreds of metropolitan areas with variable pricing based on time, distance, and demand surge algorithms. Traditional taxi medallion systems persist in New York City where approximately 13,500 yellow cabs serve Manhattan and outer boroughs at metered rates beginning at $2.50 plus $0.50 per fifth mile. Airport ground transportation includes dedicated shuttles, rental car facilities, public transit connections, and ride-hailing pickup zones with regulations varying by airport authority.

Car-sharing services including Zipcar and Turo allow hourly or daily vehicle access in urban areas where parking costs and insurance make ownership impractical for occasional use. Electric vehicle charging networks have expanded along interstate corridors with Tesla Supercharger stations, Electrify America, ChargePoint, and EVgo providing DC fast charging, though station density remains highest in California, the Northeast Corridor, and major metropolitan areas. Range limitations and charging time still constrain electric vehicle viability for transcontinental routes through sparsely populated regions.

Alaska requires floatplanes or ferries for reaching coastal communities without road access. The Alaska Marine Highway operates ferries covering 3,500 miles of coastline connecting 35 communities from Bellingham, Washington to Dutch Harbor in the Aleutian Islands. Hawaii inter-island flights through Hawaiian Airlines, Southwest, and Mokulele Airlines connect Honolulu with Maui, Kauai, and the Big Island in approximately 30 to 50 minutes per segment, as no ferry service operates between major islands.

Bicycle infrastructure varies dramatically with Portland, Oregon; Minneapolis; and Davis, California maintaining extensive protected lane networks while most cities provide limited separated facilities. Bike-sharing programs operate in dozens of cities with Citi Bike in New York offering 20,000 bicycles at approximately 1,300 stations across Manhattan, Brooklyn, Queens, and the Bronx. Pedestrian infrastructure in older northeastern cities supports walking as primary transportation while sprawling sunbelt metropolitan areas built after 1950 often lack continuous sidewalks outside downtown cores.

Seasonal weather disrupts transportation across multiple regions. Winter storms close mountain passes in the Cascade Range, Sierra Nevada, and Rocky Mountains requiring tire chains or four-wheel drive between November and April. Hurricanes threaten Gulf Coast and Atlantic regions June through November causing airport closures and evacuation orders. Summer heat exceeding 115 degrees Fahrenheit grounds aircraft in Phoenix when air density drops below operational thresholds for certain aircraft types.

Border crossings into Mexico at San Diego-Tijuana, El Paso-Ciudad Juárez, and Laredo-Nuevo Laredo process millions of vehicle crossings annually with wait times ranging from 15 minutes to over three hours depending on time of day and port of entry. Canadian border crossings at Detroit-Windsor, Buffalo-Niagara Falls, and Blaine-Surrey operate with generally shorter delays. Enhanced driver's licenses or passport cards suffice for land crossings while air travel requires passport books.