U.S. Department of Transportation (DOT) rules in 14 CFR Part 250 require Sun Country Airlines, as a DOT-certified U.S. carrier, to pay denied boarding compensation (DBC) to passengers involuntarily denied boarding due to oversales on domestic U.S. flights and certain foreign flights from U.S. airports. Compensation amounts under 14 CFR § 250.5 are adjusted by a CPI-U inflation formula from a $775 base in § 250.5(a)(2), rounded to the nearest $25 (200% of one-way fare for arrival 1-4 hours late; 400% for over 4 hours). Airlines must first seek volunteers and minimize involuntary denials. This does not cover voluntary bumping, delays, cancellations, or non-U.S. rules like EU/UK 261.
Contact Sun Country immediately for payment and a written explanation. If denied a valid claim, file a complaint with DOT at transportation.gov/airconsumer/file-consumer-complaint. Gather boarding pass, itinerary, denial notice, and arrival details as evidence.
DOT Rules Controlling Overbooked Flight Compensation
14 CFR Part 250 governs oversales practices for direct air carriers like Sun Country Airlines holding a DOT certificate (excluding helicopter operators). It applies to passengers on flights between U.S. points (domestic) and foreign air transportation where denial occurs at a U.S. airport. Carriers must provide clear, understandable information on oversale rules and denied boarding compensation, seek volunteers before involuntary bumping, and pay DBC promptly for eligible cases.
Under § 250.5, DBC equals 200% of the passenger's one-way fare (capped and adjusted by the CPI-U formula) if alternate transportation arrives 1-4 hours late, or 400% if over 4 hours late. The formula multiplies the current § 250.5(a)(2) limit (referenced as $775 base in recent updates) by the ratio of July CPI-U for the adjustment year to August 2011 CPI-U, rounded to the nearest $25. A 2024 Federal Register notice details this ongoing adjustment process. Exceptions in § 250.6 may limit liability, such as if no alternate transport is available or the passenger refuses it.
DOT's oversales guidance confirms carriers must offer cash or check for voluntary denied boarding.
| Factor | DOT Requirement |
|---|---|
| Applicability | Domestic U.S. flights; foreign from U.S. airports (Sun Country as DOT carrier) |
| Compensation Trigger | Involuntary denied boarding after volunteers sought |
| Amount Formula | 200%/400% of fare, CPI-U adjusted from $775 base |
| Exceptions | § 250.6 (e.g., no alternate transport, passenger refusal) |
What Does Not Control Sun Country Overbooked Compensation
DOT Part 250 covers only involuntary denied boarding from oversales, not voluntary incentives (negotiated separately), flight delays, cancellations, or no-shows. For example, in 2023, U.S. carriers involuntarily denied boarding to 24,756 passengers (29 per million enplaned), per Federal Register data, but this excludes other disruptions.
Non-U.S. regimes like EU/UK 261 do not apply to U.S. domestic flights. Credit card chargebacks or general merchant refunds are separate from DOT DBC and do not substitute for airline payment obligations. No Sun Country-specific overbooking policy beyond DOT compliance appears in official evidence.
Next Steps for Claiming Compensation
Request DBC from Sun Country at the gate or airport counter, preferring cash or check. If alternate transport is arranged, payment follows within specified timeframes under DOT rules. Airlines must provide a written notice explaining the denial and compensation.
Evidence Checklist:
- Boarding pass and itinerary
- Written denial notice from airline
- Details of alternate transportation and actual arrival time
- Proof of one-way fare paid
Check Sun Country's Contract of Carriage or Customer Service Plan for DOT-aligned procedures. If the airline denies a valid involuntary claim, escalate via DOT's online complaint form. DOT does not award compensation but investigates carrier compliance.
FAQ
Does Sun Country follow DOT overbooking rules?
Yes, as a DOT-certified U.S. carrier on applicable flights.
What if I volunteered to be bumped?
Negotiate incentives separately; no automatic DBC under Part 250.
Is compensation guaranteed for overbooked flights?
Only for involuntary denied boarding after volunteers are sought and no § 250.6 exceptions apply.
How do I calculate the exact DBC amount for 2026?
Apply the § 250.5 CPI-U formula; verify latest via Federal Register or DOT updates.