✈️ What counts as a US domestic flight

A US domestic flight departs and arrives inside the United States. This includes the contiguous 48 states, Alaska, Hawaii, Puerto Rico, and other U.S. territories. Flights to Canada, Mexico, or the Caribbean are considered international.

🧭 Where to book domestic flights

Choose a booking channel based on control, comparison needs, and loyalty benefits:

• 🏢 Airline websites: Best for changes, clear fare rules, and earning airline miles. Examples: American Airlines, Delta, United, Southwest.
• 🌐 Flight search tools: Use them to compare fares across carriers — for example, Google Flights, Kayak, and Skyscanner.
• 👥 Travel advisors: Useful for complex itineraries and group bookings where coordination matters.

🕒 When to book

Airfare for domestic travel changes frequently. For most U.S. routes, searching and booking within 1–3 months of departure balances price and availability. Use price alerts to monitor fluctuations and consider midweek departures for more competitive fares.

💳 What you need to complete a booking

• Full legal name exactly as on government ID
• Date of birth and contact details
• Payment card or approved payment method

No passport is required for US domestic flights; a TSA-acceptable ID is sufficient.

👮 TSA ID and security essentials

Travelers must present an approved form of identification at the security checkpoint. Acceptable IDs include state driver’s licenses, REAL ID-compliant IDs, or a U.S. passport. For full screening details consult the TSA: tsa.gov.

🧳 Baggage rules and fees

Baggage allowances and charges vary by airline and fare class. Common patterns:

• Carry-on + personal item is commonly included on major carriers; some basic fares limit carry-on access.
• Checked-bag fees typically range from $30–$40 for the first bag; Southwest offers two free checked bags on most fares.

Always verify baggage policy on the airline’s official site before flying to avoid unexpected fees.

📲 After you book

After purchase you will receive a confirmation number and an email itinerary. Download the airline app to access mobile boarding passes, gate updates, and real-time alerts. Most airlines open online check-in 24 hours before departure.

💡 Smart booking strategies

• Compare fares from nearby airports to find better options.
• Use fare tracking tools and set alerts instead of buying immediately.
• Evaluate whether basic economy suits your needs — it can reduce costs but limit carry-on or seat choice.
• Redeem miles or travel credit when value aligns with your travel plans.

🧾 Cancellations, credits, and refunds

Most U.S. airlines provide a 24-hour cancellation window for direct bookings. Non-refundable tickets may be eligible for travel credit; refundable tickets and certain disruptions qualify for a refund. Check the airline’s specific refund policy before purchase.