The cheapest times to fly from IAH to CNS are

  • January 22nd to June 17th
  • August 13th to September 2nd
  • November 5th to November 18th

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from IAH to CNS is late May. Prices can be as high as $3698 for Friday flights during late December, or as low as $1344 for Tuesday flights around late May.


When to Fly to Cairns

Flying from Houston, TX (IAH) to Cairns (CNS) will usually cost between $1501 to $2885 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late May with an average ticket price of $1458. Due to high demand the most expensive time to fly is late December, with an average price of $3397. Planning your trip to low-cost times can easily save you $1939 on economy flights and even more on first-class flights. Generally, any price below $1796 can be considered a good price for a round-trip IAH to CNS flight.

See below for a graph of average weekly prices for the IAH to CNS route. All prices are for round-trip tickets in USD.

IAH to CNS Flight Prices

Compared to other flights, the IAH to CNS flight is more expensive than the average and costs more than the average flight leaving from Houston. The average price per mile (for a direct flight) is $0.13, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Fridays are the most expensive days to fly to Cairns, and Saturdays are the most expensive days to return to Houston. Selecting flights on the least expensive days could save you up to $127 (6%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $1783. Return trip prices are from the CNS to IAH flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from IAH to CNS can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 16 hour 17 minutes may not be realistic.


Flight Hacking IAH to CNS

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from IAH to CNS — but Champion Traveler does!

Hack #1: Singapore (IAH > SIN > CNS)

  • Price for both tickets: $1289
  • Average savings: $507 (28.23%)

See IAH to SIN flights

Hack #2: Los Angeles, CA (IAH > LAX > CNS)

  • Price for both tickets: $1370
  • Average savings: $426 (23.72%)

See IAH to LAX flights

Hack #3: Denpasar (IAH > DPS > CNS)

  • Price for both tickets: $1486
  • Average savings: $311 (17.29%)

See IAH to DPS flights


Flight Questions Answered

Still have questions about flying from IAH to CNS? We’ve got answers.

Which airlines fly this route?

You can find 15 major airlines flying this route most often: Air Canada, Air France, Air New Zealand, Alaska, American, Cathay Pacific, Delta, EVA Air, Hainan, Hawaiian, JAL, Qantas, Singapore Airlines, United, Virgin Australia, and potentially more during busy seasons.

How far away is it from Cairns International Airport to George Bush Intercontinental/Houston Airport?

The distance between the two airports is roughly 8502 miles or 13683 kilometers.

How long does it take to fly from IAH to CNS?

The real-world flight time for a nonstop IAH to CNS flight is about 16 hour 17 minutes.

How many flights go between Houston, TX and Cairns?

It depends on the day of the week and the date, but a typical day might have around 11 available flights from IAH to CNS.


Airport Location Info


Departing Airport

Origination code IAH
Origination airport name George Bush Intercontinental/Houston Airport
City Houston, TX
Country the United States
Latitude 30
Longitude -95.3

Return Airport

Destination code CNS
Destination airport name Cairns International Airport
City Cairns
Country Australia
Latitude -16.9
Longitude 145.8


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.