Delta Air Lines · Last verified September 8, 2026
Delta Air Lines
The most reliable large US carrier.
TRI Score
89.7
Excellent
#1 Best Airlines
Overview
Our assessment
Delta ranks first on the measure that matters most to a working traveller: the flight leaves and arrives when it says it will. Award pricing is its weakest component.
Best for
- Business travellers
- Anyone who cannot miss a connection
Not ideal for
- Travellers optimising award value
Score breakdown
Why it scored 89.7
- Capability30%
- 90
- Value20%
- 82
- Ease of Use15%
- 90
- Reliability15%
- 96
- Professional Utility10%
- 92
- Momentum10%
- 86
How much the product can actually do, and how well it does the core job.
What you get for the price, including what the free plan really covers.
Time from signup to useful result, without training or a consultant.
Consistency, uptime, support responsiveness and predictable behaviour.
How well it fits real professional workflows, not demos.
Rate of meaningful improvement over the last two evaluation cycles.
Trade-offs
Strengths and weaknesses
- Best on-time performance among large US carriers
- Consistent cabin product
- Dynamic award pricing is poor value
- Premium fares
Score history
How the score moved
- Jan 202687.3
- Apr 202688.1
- Jun 202688.9
- Sep 202689.7Latest evaluation cycle.
Head-to-head
Compared with
- No published head-to-heads yet.
Alternatives
Others in this category
- United Airlines85.2
- American Airlines82.4
Evidence
Sources
- Public dataPublic pricing and documentation
Where a claim could not be verified, we label it rather than estimate it. Read the methodology.