If you’re flying with Delta Airlines, checking in isn’t just a routine task anymore, it’s part of a highly streamlined, digital-first journey. In 2025, Delta has turned check-in into a customizable experience. Whether you’re the kind of traveler who prefers everything handled before leaving the house, or you still like the reassurance of an airport kiosk, Delta gives you multiple paths to the gate.
With a focus on automation, speed, and personalization, Delta’s check-in system supports millions of passengers each year across domestic and international flights. And while the pandemic accelerated touchless tech adoption, Delta didn’t stop there. It expanded its ecosystem to include real-time updates, biometric options, and SkyMiles-specific features that make the process smoother for frequent flyers.
This comprehensive guide breaks down all of Delta’s check-in methods, including what’s changed, what’s stayed consistent, and how to choose the most efficient option based on your itinerary and travel habits.
What Are Your Check-In Options When Flying Delta?
Delta offers four main ways to check in, each designed for different traveler preferences and situations:
- Online Check-In (via delta.com)
You can check in starting 24 hours before your scheduled departure directly on Delta’s official website. This is ideal if you’re traveling with carry-on only or want to skip kiosk lines. - Mobile App Check-In (Fly Delta App)
The Fly Delta app allows you to check in, access your boarding pass, track your bags, and receive real-time updates, all in one place. - Self-Service Kiosk Check-In
At major airports, Delta’s self-serve kiosks allow you to check in, print your boarding pass, and tag checked bags without speaking to an agent. - Airport Counter Check-In
If you need special assistance, are traveling with pets or unaccompanied minors, or have international travel documents to verify, in-person check-in is still available at the airport.
You can use any method that suits your situation, just make sure you meet Delta’s check-in and baggage cutoff times.
How Does Online Check-In Work with Delta?
Delta’s online check-in is available at delta.com and opens 24 hours before departure.
Steps for Online Check-In:
- Visit delta.com/checkin
- Enter your confirmation number, SkyMiles number, or ticket number
- Review your itinerary
- Select or confirm your seat
- Add checked bags if needed (fees apply)
- Print your boarding pass or send it to your email/mobile device
Online check-in is particularly helpful if:
- You’re traveling with carry-on only
- You want to avoid airport kiosks or lines
- You’re departing from a U.S. airport
Expert Tip: Even if you plan to check bags at the airport, checking in online saves time. You can proceed directly to the bag drop counter.
How to Use the Fly Delta App for Check-In
The Fly Delta app remains the most convenient check-in option for most travelers. It integrates boarding passes, gate notifications, upgrade status, and baggage tracking in one mobile interface.
How to Check In on the App:
- Download and open the Fly Delta app
- Log in using your SkyMiles account (or enter confirmation code)
- Tap “Check In” when it becomes available (24 hours before departure)
- Add checked bags and pay baggage fees if needed
- Save your digital boarding pass to your Apple Wallet or Google Wallet
Key Benefits:
- Real-time gate changes and alerts
- Airport maps for terminals like ATL, JFK, LAX
- Upgrade status and seat change functionality
- In-app tracking of checked bags with time-stamped scan points
Expert Tip: The Fly Delta app is a must if you’re flying through a hub like ATL or JFK, where gates often change close to departure.
What Happens at the Airport Kiosk?
Delta’s self-service kiosks are available in all major domestic airports and most international departure points. These kiosks allow you to check in, pay for bags, and print bag tags without waiting in line at a counter.
At the Kiosk You Can:
- Scan your passport or enter confirmation code
- Select or confirm seats
- Pay for and tag checked bags
- Print your boarding pass or email it to yourself
- Add your SkyMiles number if not already included
This method works well if:
- You’re checking a bag but don’t need extra assistance
- You don’t have access to a printer or the Fly Delta app
- You arrive early and want to move through check-in quickly
Expert Tip: If you’ve already checked in online or via the app, you can still use a kiosk just to print bag tags.
When Should You Use Airport Counter Check-In?
While many travelers prefer digital check-in, Delta still offers full-service counter assistance at all airports for specific travel situations.
Use Counter Check-In If:
- You’re traveling internationally and need to verify documents
- You’re flying with pets in the cabin or cargo
- You’re checking in as an unaccompanied minor
- You’re traveling with medical equipment or oversized items
- You require wheelchair assistance or support with accessibility needs
Delta’s agents are trained to handle complex travel cases. The lines at counters can be longer than kiosks, so allow extra time if this is your only option.
What Are Delta’s Check-In Deadlines?
Failing to meet check-in deadlines can result in denied boarding, even if you’re at the airport.
Domestic Flights (within the U.S.):
- Check-in deadline: 30 minutes before departure
- Bag drop deadline: 45 minutes before departure
International Flights:
- Check-in deadline: 1 hour before departure
- Bag drop deadline: 1 hour before departure
Boarding typically closes 15 minutes before departure, even if you’ve checked in. Make sure you’re at the gate on time.
Expert Tip: If you’re traveling during peak times (early morning, holidays, or weekends), arrive at the airport 2–3 hours early even for domestic flights.
What Documents Do You Need to Check In?
You’ll need to present different documents depending on your itinerary and check-in method.
Required Documents:
- Government-issued ID (e.g., passport or driver’s license)
- Delta confirmation code or e-ticket number
- Valid travel visa or health certificate (for international travel)
- Credit card (if checking bags or upgrading seats)
For domestic U.S. flights, a REAL ID-compliant driver’s license is now required unless you’re using a passport.
Can You Check In with TSA PreCheck or CLEAR?
Yes. Delta is integrated with both programs.
- If you’re enrolled in TSA PreCheck, your boarding pass will reflect PreCheck status, whether you check in online, in-app, or at the kiosk.
- CLEAR members can use expedited ID verification at participating airports, then proceed through PreCheck or standard security.
Expert Tip: Make sure your name and date of birth match exactly across your TSA PreCheck, SkyMiles, and booking records, or your benefits may not apply.
Delta Air Lines gives you flexible, tech-forward check-in options, whether you prefer to check in from your phone, a kiosk, or with the help of a counter agent. To make your departure smooth, check in 24 hours before your flight, verify your ID and documents, and always leave enough time to navigate the airport.
Using the Fly Delta app or delta.com not only saves time but gives you real-time control of your trip, from seat changes to last-minute upgrades. Whether you’re flying domestic or international, business or leisure, mastering Delta’s check-in process makes your journey smoother from the start.
FAQs About Delta Airlines Check-In
When does online check-in open?
Exactly 24 hours before your scheduled departure.
Can you check in and add a bag later?
Yes. You can check in online and add a bag later at the airport kiosk or bag drop.
Do you need to print your boarding pass?
No. You can use a mobile boarding pass from the app or email.
What happens if you miss the check-in window?
Delta may deny boarding. You’ll need to speak to an agent to rebook.
Can you check in for international flights online?
Yes, but you must present your passport and any required visas at the airport.