Check security wait times on the IAH website to plan your arrival at the airport efficiently.

Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Round-trip from | $881 (Trip.com) |
One-way from | $550 (Kiwi.com) |
Popular in | December |
Cheapest in | April |
Average price | $1,344 |
Good round-trip deal | $839 or less |
Good one-way deal | $958 or less |
Fly from
Fly to
Route
Depart
Return
Price
HoustonSydney
IAH - SYD
IAHSYD
Houston George Bush Intcntl
Mon 12/29
8:25 pm-7:00 am
Nonstop17h 35m
Sydney Kingsford Smith
Mon 1/12
11:50 am-10:25 am
Nonstop15h 35m
HoustonSydney
IAH - SYD
IAHSYD
Houston George Bush Intcntl
Sat 1/24
2:22 pm-9:15 am
1 stop25h 53m
Sydney Kingsford Smith
Sun 2/8
11:50 am-10:25 am
Nonstop15h 35m
HoustonSydney
IAH - SYD
IAHSYD
Houston George Bush Intcntl
Mon 12/29
4:00 pm-8:30 am
1 stop23h 30m
Sydney Kingsford Smith
Mon 1/12
10:40 am-5:46 pm
2 stops24h 06m
HoustonSydney
IAH - SYD
IAHSYD
Houston George Bush Intcntl
Sat 1/17
3:22 pm-6:20 am
1 stop21h 58m
Sydney Kingsford Smith
Fri 1/30
11:50 am-10:25 am
Nonstop15h 35m
HoustonSydney
IAH - SYD
IAHSYD
Houston George Bush Intcntl
Tue 12/2
8:25 pm-7:00 am
Nonstop17h 35m
Sydney Kingsford Smith
Tue 12/9
11:50 am-10:25 am
Nonstop15h 35m
HoustonSydney
IAH - SYD
IAHSYD
Houston George Bush Intcntl
Sun 12/7
8:25 pm-7:00 am
Nonstop17h 35m
Sydney Kingsford Smith
Sun 12/14
11:50 am-10:25 am
Nonstop15h 35m
HoustonSydney
IAH - SYD
IAHSYD
Houston George Bush Intcntl
Wed 12/10
4:00 pm-8:30 am
1 stop23h 30m
Sydney Kingsford Smith
Mon 12/29
2:15 pm-11:56 pm
1 stop26h 41m
HoustonSydney
IAH - SYD
IAHSYD
Houston George Bush Intcntl
Sat 11/8
6:28 pm-9:50 pm
2 stops34h 22m
HoustonSydney
IAH - SYD
IAHSYD
Houston George Bush Intcntl
Sat 12/6
11:32 am-8:15 pm
3 stops39h 43m
HoustonSydney
IAH - SYD
IAHSYD
Houston George Bush Intcntl
Fri 12/5
8:37 pm-8:45 am
2 stops43h 08m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
To ensure you get the cheapest price possible for a flight from Houston George Bush Intcntl Airport to Sydney, you should look to book at least 16 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Currently, June is the cheapest month in which you can book a flight from Houston George Bush Intcntl Airport to Sydney (average of $817). Flying from Houston George Bush Intcntl Airport to Sydney in December is currently the most expensive (average of $856). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
One of the essential ways to save on airfare from Houston George Bush Intcntl Airport to Sydney is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight at noon could potentially save you up to 47% on airfare.
Travelers seeking maximum savings on their Houston George Bush Intcntl Airport to Sydney flight should consider departing on Wednesday at noon when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Food
Boarding
Crew
Comfort
Overall
Entertainment
Reviews
Anonymous,Oct 2025
CNS - NAN
Food
Boarding
Crew
Comfort
Overall
Entertainment
Reviews
Anonymous,Oct 2025
CNS - NAN
Food
Boarding
Crew
Comfort
Overall
Entertainment
Reviews
Anonymous,Oct 2025
CNS - NAN
Food
Boarding
Crew
Comfort
Overall
Entertainment
Reviews
Anonymous,Oct 2025
CNS - NAN
Food
Boarding
Crew
Comfort
Overall
Entertainment
Reviews
Anonymous,Oct 2025
CNS - NAN
Food
Boarding
Crew
Comfort
Overall
Entertainment
Reviews
Anonymous,Oct 2025
CNS - NAN
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$337 | Average$963 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$799 | Average$948 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$828 | Average$864 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$856 | Average$1,702 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$957 | Average$1,400 | FlexibilityNo cancel fee | On-time78% | |
| Cheapest$983 | Average$1,161 | FlexibilityNo cancel fee | On-time74% | |
| Cheapest$1,037 | Average$1,331 | FlexibilityNo cancel fee | On-time67% |