Research › Caribbean Air Connectivity Index 2027 › St Thomas
Ranked #11 of 28
St Thomas
Printed from https://destinito.com/research/caribbean-air-connectivity/st-thomas. The online page is the current version and carries any corrections.
- Weekly departures
- 192
- Direct destinations
- 18
- Airlines
- 8
- Estimated weekly seats
- 7,959
St Thomas
| Weekly departures | Weekly seats | Destinations | Airlines | Largest carrier share |
|---|---|---|---|---|
| 192 | 7,959 | 18 | 8 | 39.4% |
St Thomas ranks 11th overall (43.9) and 10th regionally (53.3). It is a regional connector: it serves 10 Caribbean islands, its largest partner, Puerto Rico (San Juan), takes 34.9% of Caribbean departures, and it has 1,748 Caribbean seats.
The United States takes 78.0% of seats and the Caribbean 22.0%. The busiest routes are flown mostly by Cape Air (9K): Puerto Rico (San Juan) with 53 departures and 630 seats, St Croix with 51 departures and 459 seats, and St Barths with 14 departures and 126 seats. Miami (MIA), with 14 departures, carries 2,240 seats on American Airlines (AA).
American Airlines holds 39.4% of seats (HHI 2,351). Redundancy is the lowest in the index: only 1 destination, 5.6%, has more than one airline. For 133 of the 192 departures, seats were estimated from an airline-level default, not from a specific aircraft model. The figures include 162 seats on a JetBlue (B6) leg to Puerto Rico (San Juan) of a flight continuing to Boston (BOS). In full-year 2025 data, departing domestic US flights were 83.4% full and departing international Caribbean flights 45.4%.
Score and rank
The connectivity score is an index on 0–100 built from departures, destinations, airlines, hub links and seats; the regional score uses the Caribbean subset only. Both are defined in the methodology. Not a percentage — an island does not have "96% connectivity".
| Measure | Score | Rank |
|---|---|---|
| Overall | 43.9 | #11 of 28 |
| Regional (Caribbean only) | 53.3 | #10 of 28 |
Destinations and airlines
St Thomas has 10 direct Caribbean destinations and 8 beyond the region, with 152 of its 192 weekly departures staying inside the Caribbean. It has direct service to 8 of the index's connecting hubs.
| Airline | Weekly departures | Destinations |
|---|---|---|
| Cape Air | 144 | 7 |
| American | 21 | 2 |
| Delta Air Lines | 7 | 1 |
| United | 7 | 4 |
| Contour Aviation | 6 | 2 |
| Southwest | 5 | 1 |
| JetBlue | 1 | 1 |
| Sky High Aviation | 1 | 1 |
Market mix
Estimated weekly seats by the region a flight goes to. Seats are estimated from aircraft type, not booked or flown.
| Market | Estimated weekly seats | Share |
|---|---|---|
| North America | 6,211 | 78.0% |
| Caribbean | 1,748 | 22.0% |
Resilience
How exposed this island's connectivity is to one airline or one route stopping. All three figures are derived from the route table below, so they can be checked against it.
| Carrier concentration (HHI on seats) | 2,351 of 10,000 — higher is more concentrated |
|---|---|
| Largest carrier by seats | American at 39.4% of seats |
| Destinations served by 2+ airlines | 1 of 18 (5.6%) |
| Most-served Caribbean destination | SJU, carrying 34.9% of Caribbean departures |
Gateway reach
Long-haul arrivals at the cluster gateway that connect onward to St Thomas within the same day, with the best total journey time. Only islands in a gateway cluster have this.
| From | Via | Arrivals in week | Connecting | Best total hours |
|---|---|---|---|---|
| FLL | SJU | 34 | 31 | 4.8 |
| MDE | SJU | 12 | 5 | 4.8 |
| MIA | SJU | 55 | 33 | 4.9 |
| MCO | SJU | 129 | 61 | 5.0 |
| BOG | SJU | 10 | 10 | 5.1 |
| LAL | SJU | 4 | 4 | 5.1 |
| TPA | SJU | 28 | 10 | 5.2 |
| JAX | SJU | 7 | 1 | 5.6 |
| FLL | SXM | 7 | 1 | 5.7 |
| ATL | SJU | 33 | 26 | 5.7 |
| ORF | SJU | 4 | 4 | 5.9 |
| PTY | SJU | 14 | 7 | 6.0 |
| EWR | SJU | 29 | 21 | 6.0 |
| BOS | SJU | 20 | 14 | 6.1 |
| IAD | SJU | 8 | 7 | 6.2 |
| JFK | SJU | 41 | 27 | 6.2 |
| BWI | SJU | 14 | 5 | 6.3 |
| HVN | SJU | 4 | 2 | 6.4 |
| PHL | SJU | 36 | 28 | 6.4 |
| BDL | SJU | 14 | 7 | 6.5 |
| DTW | SJU | 1 | 1 | 7.0 |
| PTY | SXM | 3 | 1 | 7.0 |
| HPN | SJU | 5 | 5 | 7.1 |
| BUF | SJU | 4 | 4 | 7.3 |
| MSP | SJU | 2 | 2 | 7.3 |
| YYZ | SJU | 1 | 1 | 7.3 |
| ORD | SJU | 15 | 14 | 7.5 |
| NLU | SDQ | 4 | 1 | 7.7 |
| IAH | SJU | 14 | 7 | 8.1 |
| EWR | SDQ | 31 | 1 | 8.3 |
| YUL | SXM | 1 | 1 | 8.7 |
| DFW | SJU | 12 | 7 | 8.8 |
| AMS | SXM | 6 | 2 | 11.3 |
| MAD | SJU | 11 | 7 | 11.8 |
| CLT | SJU | 14 | 14 | — |
| USA | SJU | 2 | 2 | — |
Load factors
Actual passengers against actual seats, from Eurostat (2024) and BTS T-100 (2025). Monthly and historical: these do not describe the reference week. Route-months the source reports inconsistently are excluded, so every figure here is publishable.
| Source | Direction | Market | Months | Load factor |
|---|---|---|---|---|
| T100D | Inbound | Caribbean | 12 | 67.4% |
| T100D | Inbound | North America | 12 | 83.8% |
| T100D | Outbound | Caribbean | 12 | 71.0% |
| T100D | Outbound | North America | 12 | 83.4% |
| T100I | Inbound | Caribbean | 12 | 45.9% |
| T100I | Outbound | Caribbean | 12 | 45.4% |
Low season against peak
Peak week pending. This edition measures the week of 19 October 2026 only, and that week is an early shoulder week rather than the bottom of the season — some winter services start in October and others in November and December. The peak week is collected separately, and no low-versus-peak comparison is shown until it exists.
Routes
Every scheduled departure in the reference week, grouped by destination and airline. Seats are estimated; see the methodology for how, and for what "estimated" excludes.
Within the Caribbean
| From | To | Airline | Weekly departures | Est. weekly seats |
|---|---|---|---|---|
| STT | SJU | Cape Air | 52 | 468 |
| STT | STX | Cape Air | 51 | 459 |
| STT | SBH | Cape Air | 14 | 126 |
| STT | EIS | Cape Air | 9 | 81 |
| STT | AXA | Cape Air | 7 | 63 |
| STT | NEV | Cape Air | 7 | 63 |
| STT | DOM | Contour Aviation | 4 | 120 |
| STT | SKB | Cape Air | 4 | 36 |
| STT | SXM | Contour Aviation | 2 | 60 |
| STT | SDQ | Sky High Aviation | 1 | 110 |
| STT | SJU | JetBlue | 1 | 162 |
Beyond the region
| From | To | Airline | Weekly departures | Est. weekly seats |
|---|---|---|---|---|
| STT | MIA | American | 14 | 2,240 |
| STT | ATL | Delta Air Lines | 7 | 1,260 |
| STT | CLT | American | 7 | 896 |
| STT | MCO | Southwest | 5 | 715 |
| STT | EWR | United | 2 | 320 |
| STT | IAD | United | 2 | 320 |
| STT | IAH | United | 2 | 300 |
| STT | ORD | United | 1 | 160 |
Compare
Back to the full 28-island table to see where St Thomas sits against the rest.
