The primary international entry point is John F. Kennedy International Airport in New York City, which processed approximately 62 million passengers in 2019 according to Port Authority records. Los Angeles International Airport serves as the dominant Pacific gateway with documented traffic exceeding 88 million passengers in the same period, making it the world's fourth-busiest airport by passenger count. Other major international hubs include Chicago O'Hare, which handles over 83 million annual passengers, and Hartsfield-Jackson Atlanta International Airport, consistently ranked as the world's busiest by total passenger volume at approximately 107 million annually. San Francisco International Airport processes around 58 million passengers yearly and serves as the principal entry point for travelers arriving from Asia who intend to visit Northern California or connect to domestic flights.
Immigration processing occurs at the first point of entry regardless of final destination. The Automated Passport Control kiosks now serve citizens of Visa Waiver Program countries, reducing processing time to an average of 15 minutes during off-peak hours. U.S. Customs and Border Protection requires all arriving international passengers to submit a customs declaration form, either electronically via the Mobile Passport Control app or on paper. The Electronic System for Travel Authorization must be completed at least 72 hours before departure for travelers from the 40 countries participating in the Visa Waiver Program. Processing times at immigration vary from 20 minutes at smaller international airports to over two hours at JFK during late afternoon arrival peaks between 3 PM and 7 PM Eastern Time.
Baggage claim at major hubs occupies terminal space ranging from 18 carousels at Los Angeles International to 12 at Miami International Airport. Delays between aircraft arrival and first bag appearance average 25 minutes at efficiently managed facilities and can extend past 50 minutes during weather disruptions or equipment failures. Agricultural inspections occur after baggage claim for passengers arriving from international origins. Officers may open and inspect bags containing any declared food products, plants, or soil. The United States Department of Agriculture prohibits entry of fresh fruits, vegetables, meats, and plants from most countries without advance permits, and violations carry fines starting at 300 dollars for first offenses.
Ground transportation from international terminals includes rail connections at 11 major airports. The AirTrain JFK connects all terminals to the New York City Subway system with travel time to Manhattan averaging 60 minutes and total cost of 10.75 dollars combining AirTrain and subway fares. The Blue Line rail service from Chicago O'Hare to downtown Chicago runs 24 hours with 45-minute travel time and a fare of 5 dollars. San Francisco International Airport connects to the Bay Area Rapid Transit system with 30-minute service to downtown San Francisco at a cost of 10.15 dollars. Washington Dulles International Airport offers Silver Line Metro service to downtown Washington D.C. with 60-minute travel time and 6 dollar fare during peak hours.
Taxi services operate under fixed-rate or metered systems depending on the airport. The flat rate from JFK to Manhattan is 70 dollars before tolls and gratuity. Metered taxis from Los Angeles International to downtown Los Angeles average 46.50 dollars based on published fare calculators. Chicago O'Hare to downtown Chicago runs approximately 40 dollars on the meter. Ride-sharing services operate from designated pickup zones at all major airports with pricing that fluctuates based on demand. A ride from Los Angeles International to Santa Monica during off-peak hours typically costs between 35 and 45 dollars, while the same trip during evening rush can exceed 65 dollars.
Shuttle buses connect airports to city centers and nearby hotels, with SuperShuttle having operated shared-van services at 11 major hubs before ceasing operations in 2019. Current shared shuttle options vary by city with typical fares ranging from 17 to 30 dollars per person for airport-to-hotel transfers. Private car services book through hotel concierges or directly and charge between 80 and 150 dollars for sedans serving major airport routes. Rental car facilities at the 20 busiest airports are located either in the terminal or accessible via dedicated shuttle buses that run every 5 to 10 minutes during daytime hours.
Currency exchange counters in international terminals operate with exchange rates approximately 5 to 8 percent less favorable than mid-market rates. Travelex maintains the largest number of airport exchange locations with 27 counters across major hubs. ATMs in arrival halls dispense U.S. dollars with foreign transaction fees and ATM operator charges combining for total costs between 3 and 7 dollars per withdrawal depending on the issuing bank. Most major banks charge a foreign transaction fee of 1 to 3 percent on top of the withdrawal fee. Credit cards offering no foreign transaction fees eliminate this cost, though currency conversion still occurs at the card network's rate.
SIM cards for cellular service are available at airport retail stores in international terminals. T-Mobile and AT&T operate branded stores at Los Angeles International, JFK, and Miami International airports with prepaid tourist plans starting at 30 dollars for 2GB of data valid for 10 days. Vending machines dispensing prepaid SIM cards exist at 8 major international terminals with prices ranging from 25 to 40 dollars for plans offering between 1GB and 5GB of data. Airport WiFi is free at all major hubs with connection requiring an email address for registration. Network speeds vary from 5 Mbps during peak congestion to 25 Mbps during overnight hours.
Arriving passengers clear security screening again when connecting to domestic flights. The Transportation Security Administration checkpoint processing time averages 15 minutes for TSA PreCheck members and 30 minutes for standard screening during typical travel periods. During peak domestic travel days surrounding Thanksgiving and the December holidays, security wait times at major hubs regularly exceed 60 minutes. The federal government requires all passengers to remove shoes, belts, and light jackets, and to place laptops and tablets in separate bins during screening. Liquids must be in containers of 3.4 ounces or less and fit within a single quart-sized clear plastic bag.
Hotel shuttles serving airport properties run on schedules ranging from every 15 minutes for major chains to on-call service for smaller properties. Most shuttles stop at designated pickup zones marked with signs indicating hotel shuttle waiting areas. The furthest hotels offering airport shuttle service are typically located within 8 miles of the terminal. Travel time to nearby airport hotels ranges from 8 to 20 minutes depending on traffic and number of stops. Chain hotels within 2 miles of major airports include properties from Marriott, Hilton, Hyatt, and InterContinental Hotel Group brands with nightly rates ranging from 110 dollars for limited-service properties to 280 dollars for full-service hotels with airport lounge access.
Jet lag affects eastbound travelers more severely than westbound travelers according to research published in the journal Chaos. Crossing six time zones from London to New York requires an average adaptation period of 4 to 6 days for complete circadian realignment. The Federal Aviation Administration publishes guidance noting that each time zone crossed requires approximately one day for the body's internal clock to adjust. Melatonin supplementation shows documented effects on circadian rhythm adjustment in peer-reviewed studies, though dosing and timing recommendations should come from a physician rather than general travel guidance.
Airport lounges accessible through Priority Pass memberships exist at all 20 major international gateways. The largest lounge network in the country is operated by American Express with Centurion Lounges at 10 major airports offering complimentary food, premium alcohol, and shower facilities. Day passes for airline-branded lounges cost between 50 and 75 dollars when purchased at the door. Delta Sky Clubs operate at 52 locations across the domestic network with access granted to Delta One business class passengers and premium credit card holders. United Club locations number 48 with similar access policies. Priority Pass membership grants access to over 60 lounges across the country with annual membership fees starting at 99 dollars plus 32 dollars per visit for the basic tier.
The first hours in the country after clearing customs typically involve ground transportation to accommodation, SIM card activation, and initial cash withdrawal. Terminal facilities at major hubs include 24-hour food courts, though options narrow significantly between midnight and 5 AM when only a handful of coffee shops and convenience stores remain open. Arriving passengers should confirm their accommodation address and have it written or saved digitally before approaching ground transportation, as cellular service may not activate immediately after SIM card insertion. The activation process for prepaid SIM cards can take anywhere from immediate to 2 hours depending on network congestion and the carrier's activation system.