August is the cheapest month to fly this route, with average fares around $561 round trip.
Average round-trip fares by departure month, based on current availability.
| Month | Avg Price | Lowest | Relative Cost | |
|---|---|---|---|---|
| May 2026 | $702 | $629 | Peak | |
| June 2026 | $623 | $568 | ||
| July 2026 | $586 | $547 | ||
| August 2026 | $561 | $547 | Best |
Departing on Monday offers the lowest average fares at $595. Thursday departures are the most expensive at $646, a difference of $51.
The best time to fly is August. Set up an alert and we'll notify you when prices drop.
Get Started Free →The cheapest month to fly from Houston to Cartagena is August, with average round-trip fares around $561. The lowest fare found in August is $547.
Monday departures are the cheapest, averaging $595 round trip. The most expensive day is Thursday at $646.
Based on current pricing trends, booking for August travel offers the best value. Avoid May if possible, as fares average $702 compared to $561 in the cheapest month. June is a solid middle-ground option at $623.
Flying in August instead of May can save you approximately $141 per round trip. The cheapest month averages $561 while the most expensive averages $702.
Airlines, flight times, price calendar, and more for Houston to Cartagena
View IAH → CTG Details