To increase your chances of getting a free upgrade on Delta, try the following strategies: Join Delta's loyalty program, SkyMiles, and earn elite status. Higher-tier members receive complimentary upgrades based on availability. Check-in early online, as it may give you a better chance of being considered for an upgrade. Dress professionally and politely inquire about upgrades during check-in or at the gate. Be flexible with your travel dates and times. Flights that are less crowded might have more upgrade opportunities.