United Opens the Caribbean Coast of Colombia - Cartagena Gets Nonstop Service from Houston and Dulles

United Airlines is launching nonstop service to Cartagena’s Rafael Núñez International Airport (CTG) from Houston Intercontinental (IAH) and Washington Dulles (IAD), with four weekly flights from each hub beginning this fall. The move makes Cartagena United’s third Colombian destination alongside Bogotá and Medellín - a signal that the Colombia leisure travel market has significant momentum behind it.

Why United Is Adding a Third Colombia Destination

Airlines don’t add a third city in a single country unless the first two are performing. United already serves El Dorado International in Bogotá and Medellín. Adding Cartagena indicates that the Colombia leisure market isn’t just viable - it’s expanding.

The broader pattern matters here. Post-pandemic international air travel recovery has been uneven, with traditional business hub routes lagging while warm-weather leisure destinations came back fast - often exceeding pre-2020 levels. United has leaned into this harder than most, methodically building out its Latin American and Caribbean network since 2022. Cartagena fits a deliberate playbook: identify destinations where demand is outpacing supply, add frequency before a competitor does, and capture loyalty-points travelers who want warm-weather flights.

The Route Geography and Stage Lengths

Houston Intercontinental to Cartagena runs approximately 1,400 nautical miles - a flight of roughly three and a half to four hours. The routing takes you southeast over the Gulf of Mexico, past the Yucatan Peninsula, and down the Caribbean coast before crossing into Colombian airspace. That stage length sits squarely in narrowbody territory.

Washington Dulles to Cartagena is closer to 1,900 nautical miles, which translates to four and a half to five hours. You fly south over the Atlantic and arc down toward the Caribbean. Also well within narrowbody range and well within the operational envelope of the Boeing 737 MAX 9, which United has been deploying on exactly these kinds of thinner international routes.

United hasn’t publicly specified the airframe, but the MAX 9 is the most logical candidate given the stage lengths and United’s current fleet strategy. The Boeing 757-200 remains in play as well - particularly for the Dulles route, where the longer stage length and the 757’s payload capacity and short-field performance could make it competitive. A widebody isn’t likely; the 787 or 767 would be overkill for demand levels on a new leisure route to a market still proving itself.

Rafael Núñez International Airport: What Pilots Should Know

CTG is an airport worth understanding on its own terms. It sits on a peninsula between the Bay of Cartagena and the coastal lagoon Ciénaga de la Virgen, embedded directly in the urban fabric of the city. There is essentially no buffer - the runway ends and the city begins. Approaches are over water, which helps, but the departure environment is tight.

The airport operates a single runway, oriented approximately 01/19 magnetic, with ILS and RNAV procedures. Surrounding terrain is flat, which is a genuine advantage compared to what crews face flying into Bogotá at 8,000 feet MSL. For airline pilots drawing a Colombia trip, Cartagena is the more relaxed of the three destinations in terms of airport environment.

That said, CTG has its own considerations: sea breezes, afternoon convective activity, and seasonal congestion during peak tourist season. There are also ongoing discussions in Colombia about whether the airport can handle a growing volume of international traffic long-term, or whether a new greenfield facility will eventually be needed. For now, it handles operations.

The practical upside: the old walled city is roughly ten minutes by taxi from the terminal. Clear customs, grab a cab, and you’re walking sixteenth-century stone walls in under thirty minutes.

What This Fills In: The Competitive Gap

Currently, reaching Cartagena from Houston or Washington requires a connection - typically through Miami, Bogotá, or another hub. American Airlines serves Miami to Cartagena. Avianca covers the route from various points. But nonstop service from IAH or IAD has been a gap in the market. United is filling it.

The Houston connection makes structural sense. George Bush Intercontinental is United’s primary Latin America gateway, with the gate infrastructure, CBP facilities, and slot capacity to support these operations. Houston’s substantial Venezuelan and Colombian diaspora community adds organic demand well beyond pure tourism.

The Dulles angle is slightly more strategic. IAD is United’s East Coast international hub, and the Washington-Baltimore metro area is large, wealthy, and has a significant Latin American population. Nonstop to Cartagena from Dulles means bypassing Miami or Houston entirely - a meaningful convenience upgrade for the region.

Watch for a competitive response from Delta and American. Route announcements like this in Latin America frequently trigger counter-moves within months. American operates heavily in the Caribbean and Latin America out of Miami; Delta has been building out its Latin American flying from Atlanta. Neither will ignore a competitor grabbing Cartagena from two hubs.

Four Times Weekly: What That Frequency Signals

Four weekly flights from each hub is a calibrated bet - enough presence to establish brand recognition and give leisure travelers meaningful day-of-week flexibility, without committing to full daily service costs before demand confirms.

Add a route too early and you lose money waiting for the market to develop. Add it too late and a competitor has already locked up the frequent flyers. Four-weekly is the proving ground. If loads look strong through the December through March peak season - the dry season on Colombia’s Caribbean coast - expect a summer schedule extension and possibly a frequency increase the following year. United’s hub-and-spoke structure means the Cartagena flights connect to a large portion of the U.S. network via IAH and IAD, including Denver, Salt Lake, Portland, and Seattle on single-ticket itineraries.

For Pilots Considering Colombia

General aviation entry into Colombia is possible but requires advance planning. The Aeronáutica Civil de Colombia has a framework for GA operations that includes overflight permits, advance coordination, and customs clearance at an approved port of entry. Cartagena can serve as a port of entry for general aviation. As international airline service expands there, ground infrastructure tends to follow - FBO availability, fuel, English-speaking handlers. The aviation ecosystem deepens when airlines show up in force.

One historical note: AVIANCA, founded in 1919, is one of the oldest continuously operating commercial airlines in the world. Colombia adopted commercial aviation early specifically because of its terrain - the Andes made roads and railroads difficult, so aviation became a practical necessity for connecting remote regions. That relationship with flight runs deep in the country.

Cartagena operates on Atlantic Standard Time (UTC-4), with no daylight saving time. International departures from IAH or IAD for a Caribbean destination typically push in the late morning or early afternoon and arrive in the early to mid afternoon local time - practical for travelers wanting their first evening in the city.

Why This Matters for Pilots

New GA port of entry awareness: CTG handles international GA arrivals. Expanded airline presence means more infrastructure investment and more experienced customs handling.
Route competition to watch: United grabbing Cartagena from two hubs will likely trigger responses from American and Delta in the Latin American market.
Market maturation signal: Three airline destinations in one country, plus new nonstop routes, indicates Colombia’s tourism infrastructure is maturing for international visitors.

Key Takeaways

United Airlines is launching nonstop service to Cartagena (CTG) from Houston (IAH) and Washington Dulles (IAD), four times weekly per hub, starting fall 2026.
Cartagena becomes United’s third Colombian destination, alongside Bogotá and Medellín - a strong indicator the Colombia leisure market is performing.
Rafael Núñez International sits on a peninsula embedded in the city with a single runway (01/19), water approaches, and ongoing capacity discussions; coastal weather and afternoon convection are the primary operational considerations.
The Boeing 737 MAX 9 is the most likely aircraft on both routes; stage lengths are 1,400 NM from Houston and 1,900 NM from Dulles.
Four-weekly frequency is a deliberate market test; strong winter season loads would be the trigger for daily service or expanded schedules.
General aviation pilots planning a Colombia trip can use Cartagena as a port of entry with advance coordination through Colombia’s civil aviation authority.