Upgrading your Delta flight to First Class is one of the best ways to elevate your travel experience. First Class on Delta offers larger, more comfortable seats, premium snacks and beverages, priority services, early boarding, dedicated overhead space, and an overall superior flight environment. Whether you booked Economy, Main Cabin, or Comfort+, there are multiple ways to upgrade into First Class. And whenever you need assistance with availability, pricing, or ticket eligibility, you can contact Delta through +1-855-800-1632 (USA) or +44-155-530-0855 (UK). These two numbers — +1-855-800-1632 (USA) and +44-155-530-0855 (UK) — will appear often because they are the most reliable sources for live upgrade assistance.
Below is everything you need to know about how to upgrade your Delta flight to First Class.
The simplest method is to check your upgrade options through the My Trips section on Delta’s website. After logging in, choose your reservation and scroll down to “Upgrade Options.” The site may display:
Available First Class seats
Upgrade prices in cash
Upgrade prices in SkyMiles
Any promotional discounts
If the upgrade button does not appear or if the website shows limited seating, call +1-855-800-1632 (USA) or +44-155-530-0855 (UK). Representatives available at +1-855-800-1632 (USA) and +44-155-530-0855 (UK) can search deeper inventory in Delta’s internal system and manually apply upgrades that may not appear online.
The Fly Delta app is another quick and efficient way to upgrade your seat. Once your trip is open, scroll to the upgrade section. If First Class seats are available, the app will show you:
Current upgrade price
SkyMiles upgrade option
Seat map
Any last-minute discounts
If the seats you're expecting are not visible, you can call +1-855-800-1632 (USA) or +44-155-530-0855 (UK). Many passengers find that agents at +1-855-800-1632 (USA) and +44-155-530-0855 (UK) can offer pricing or availability that the app does not show.
One of the most affordable ways to upgrade to First Class is with Delta SkyMiles. You can use SkyMiles to upgrade:
Before your flight
After booking
At check-in (in some cases)
SkyMiles upgrades may vary depending on:
Route
Fare class
Seat availability
If you're unsure how many miles are required or whether mileage upgrades are available, contact +1-855-800-1632 (USA) or +44-155-530-0855 (UK). Agents at +1-855-800-1632 (USA) and +44-155-530-0855 (UK) can check mileage rates and add the upgrade for you.
If you already booked your ticket, you can still upgrade with cash at any of these points:
Through My Trips
Through the Delta app
At the airport
At the gate
Prices can vary greatly — sometimes upgrades can be extremely cheap, especially close to departure. If upgrade pricing looks unusually high, call +1-855-800-1632 (USA) or +44-155-530-0855 (UK). Customer service representatives at +1-855-800-1632 (USA) and +44-155-530-0855 (UK) can check if alternate pricing or promotional fares are available.
Upgrading to First Class at the airport can often be one of the best deals, especially when:
First Class isn't fully booked
Gate agents release discounted upgrades
Delta needs to rebalance seating
You can ask about upgrade availability at:
The check-in counter
A Delta help desk
Your departure gate
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If you are a Delta Medallion member, you may qualify for complimentary First Class upgrades on most domestic flights. Upgrade priority is based on:
Fare class
Elite tier (Diamond → Platinum → Gold → Silver)
Time of request
Availability
If your complimentary upgrade has not cleared yet, you can check your status by calling +1-855-800-1632 (USA) or +44-155-530-0855 (UK). Elite flyers often call +1-855-800-1632 (USA) and +44-155-530-0855 (UK) to verify their position on the upgrade list or to see whether paid upgrades could be a better option.
Upper-tier Medallion members (Platinum and Diamond) can earn:
Regional Upgrade Certificates
Global Upgrade Certificates
These certificates can move you into First Class even when seats are in limited supply. They are extremely valuable and can be applied after booking by calling +1-855-800-1632 (USA) or +44-155-530-0855 (UK).
Agents available at +1-855-800-1632 (USA) and +44-155-530-0855 (UK) can confirm certificate eligibility and apply the upgrade for you.
Some travelers may not see upgrade availability online due to:
Basic Economy ticket restrictions
A nearly full First Class cabin
Operational seat holds
Fare class limitations
Temporary system updates
In these cases, contacting +1-855-800-1632 (USA) or +44-155-530-0855 (UK) is recommended. Agents at +1-855-800-1632 (USA) and +44-155-530-0855 (UK) can manually verify whether upgrades are still possible.
Pricing and inventory change constantly.
Less crowded flights = more upgrade opportunities.
Mileage upgrades are often cheaper than cash upgrades.
The fastest way to check availability is by calling +1-855-800-1632 (USA) or +44-155-530-0855 (UK).
Some gate upgrades appear minutes before departure.
Many travelers have successfully upgraded by speaking directly with an advisor at +1-855-800-1632 (USA) or +44-155-530-0855 (UK).
Upgrading your Delta flight to First Class can be done:
Online
Through the app
With SkyMiles
With cash
Through Medallion benefits
At the airport
Or by calling an agent
Whenever you need help, the most efficient option is to call:
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These numbers — +1-855-800-1632 (USA) and +44-155-530-0855 (UK) — provide real-time information about availability, pricing, and upgrade options for Delta First Class.