S$37 Cheap Flights to Si Thoi

View S$37 flight on Fri, 12 Sep, 2025Opens in a new window

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Cheap round-trip flights to Si Thoi

These prices were available within the past 7 days. Prices quoted are per person, return, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thai AirAsia
Sat, 13 Sep - Wed, 17 Sep
DMK
Bangkok
CEI
Chiang Rai
S$76 Return, found 1 day ago
S$76
Return
found 1 day ago
Select Thai AirAsia flight, departing Sat, 13 Sep from Bangkok to Chiang Rai, returning Wed, 17 Sep, priced at S$76 found 1 day ago
Thai Lion Mantari
Thu, 26 Jun - Mon, 30 Jun
DMK
Bangkok
CEI
Chiang Rai
S$188 Return, found 1 day ago
S$188
Return
found 1 day ago
Select Thai Lion Mantari flight, departing Thu, 26 Jun from Bangkok to Chiang Rai, returning Mon, 30 Jun, priced at S$188 found 1 day ago
Hahn Air Systems
Sat, 5 Jul - Sun, 6 Jul
BKK
Bangkok
CEI
Chiang Rai
S$213 Return, found 4 hours ago
S$213
Return
found 4 hours ago
Select Hahn Air Systems flight, departing Sat, 5 Jul from Bangkok to Chiang Rai, returning Sun, 6 Jul, priced at S$213 found 4 hours ago
Thai Airways International
Wed, 6 Aug - Sat, 9 Aug
BKK
Bangkok
CEI
Chiang Rai
S$220 Return, just found
S$220
Return
just found
Select Thai Airways International flight, departing Wed, 6 Aug from Bangkok to Chiang Rai, returning Sat, 9 Aug, priced at S$220 just found
AirAsia
Sat, 19 Jul - Sat, 26 Jul
KUL
Kuala Lumpur
CEI
Chiang Rai
S$293 Return, found 6 days ago
S$293
Return
found 6 days ago
Select AirAsia flight, departing Sat, 19 Jul from Kuala Lumpur to Chiang Rai, returning Sat, 26 Jul, priced at S$293 found 6 days ago

Find Your Flights to Si Thoi CEI

Cheap flights to Si Thoi (CEI)

Get started finding a cheap flight to Si Thoi on Expedia by either choosing a deal on this page or using the search bar to enter your travel dates, origin airport and whether you want a return or one-way airfare. You can filter for flexibility, number of stops, airline and departure/arrival times to find the best flight for you.

We recommend using the ‘Flexible Dates’ calendar at the top of the page to see the price of plane tickets on the surrounding dates. This allows you to pick the cheapest days to fly if your trip allows flexibility and score cheap flight deals to Si Thoi.

Return prices range from S$76 - S$293 and one-ways Si Thoi start as low as S$37.

Be aware that choosing a non-stop flight can sometimes be more expensive while saving you time. And routes with connections may be available at a cheaper rate.

 

Airlines that fly to Si Thoi (CEI)

You have several options for which airline you choose to travel with to Si Thoi. There are 10 airlines flying into CEI: Thai AirAsia, Thai Lion Mantari, Hahn Air Systems, Thai Airways International, AirAsia. 

Cheap plane tickets may be available from different airlines at different times and with unique terms. It’s best to understand the details of each airline’s offer before judging its value.

For example, if you plan to check in a bag or bring hand baggage, it's worth checking whether the cheap airfare deal includes a baggage allowance. If not, verify whether the baggage fee is higher than the difference of other airline plane ticket deals offering free checked in/hand baggage in exchange for a slightly higher airfare. 

Additionally, your preferred frequent flyer membership programmes may influence your choice of cheap airline. Expedia allows you to enter your membership numbers during checkout to earn points from your airline and Expedia Rewards—all while getting a great deal and planning all your travel on one online platform.

 

Find the best deals

At Expedia, we source many flight deals from multiple providers, so you can easily find the best deals that are right for you. A great strategy for getting the best deals can be to make sure you book and travel at optimal times. Airfare to Si Thoi (CEI) varies throughout the year based on seasonal demand. You’ll see the lowest rates for return trips to CEI in September and in September for one-ways.

 

Cancellation & flexibility

To change or cancel eligible flights, go to ‘My Trips’ and navigate to your itinerary. If you booked within the last 24 hours, you might be able to cancel your flight for free. Learn more about flight changes or cancellations from our customer service portal. Some plane tickets are available with no change fees, which you can filter for during your search.

Frequently asked questions

What is the name of Si Thoi's airport?
Chiang Rai Intl. Airport (CEI) is the one and only airport in Si Thoi.
How many airlines fly to Si Thoi?
There are 11 airlines connecting Si Thoi with 22 airports from all over the globe.
Which airlines fly to Si Thoi?
Si Thoi receives the majority of its flights from Thai AirAsia, Nok Air and Thai Lion Air with Thai AirAsia being the number one choice of airline. Bangkok is the most popular city for travellers to take off from.
How many nonstop flights are there to Si Thoi?
With approximately 747 direct flights each week, you'll be arriving in Si Thoi before you have time to say, "Are we there yet?"
Where are the most popular flights to Si Thoi departing from?
Travellers frequently depart from Bangkok, Phuket and Taipei airports when heading to Si Thoi.
How long is the flight to Si Thoi Airport?
Where you depart from determines how long you'll be strapped into your seat. From Bangkok to Si Thoi, the average flight time is 1 hour and 20 minutes. From Phuket it usually takes 2 hours and 13 minutes, and from Khon Kaen it's 1 hour and 7 minutes.
How to book the cheapest flight to Si Thoi?
We've all come across those fortunate jet-setters who somehow nab impossibly cheap plane tickets every time they fly. Want to know how to do it for your Si Thoi holiday? Don't wait until the very last minute to secure your flight. Another fantastic way to grab the best price is to shop around. If where you're headed has more than one airport, look into the cost of flying into a smaller terminal. Last but not least, be ready to book quickly if you stumble on a great deal. It might not be available for long! With a bit of knowledge and a little luck, the perfect airfare can be yours.
How to survive the flight to Si Thoi?
If you're not prepared, air travel can be a real challenge. But there's no need to panic. Follow these tips and tricks for a stress-free start to your time in Si Thoi.What to pack in your hand luggage:
  • The secret to having a stress-free travel experience is to pack ahead. Start with the essentials: passport, official ID, cash and important medications. Next, take on board items that'll help keep you entertained, like some electronic devices or a thrilling book. It's also smart to bring your chargers, a comfy neck pillow and a pair of earphones. Finally, be sure to squeeze in toiletry items like a toothbrush, facial wipes and a spare set of clothes.

Do not pack the following items in your hand luggage:
  • While the list of banned items differs between airlines, the general rule to follow is avoid carrying anything sharp, flammable or explosive. This includes things like knives, scissors, fireworks and fuel. Sporting equipment like golf clubs, and objects that could injure passengers, such as pepper spray and firearms, won't be allowed on board either.

What to wear on a flight:
  • Your goal here is to make yourself as comfortable as possible. Layer yourself up in natural-fibre clothing and remember to bring a cardigan in case it gets cool. Pick a pair of well-fitting, flat shoes as it's possible that your feet and ankles will swell a little during the journey. Leave the high heels and hiking boots in your main luggage.
  • You've probably heard about deep vein thrombosis (DVT), a blood clot condition caused by long periods of inactivity. There are numerous ways to mitigate your risk. Wear compression tights or socks, stay hydrated and keep your legs and feet moving. Do a few laps of the cabin or perform some stretches in your seat.

How to get through airport security fast when flying to Si Thoi?
The secret is to be well prepared before you reach airport security. That way, you'll be boarding that plane to Si Thoi before you know it. Follow these helpful tips and get your trip off to a spectacular start:
  • Airport security personnel first need to know that you have a valid passport and boarding pass before you can proceed any further. Have them within easy reach, ready for inspection.
  • Next up is the X-ray machine. Remove anything metal on you that is likely to beep. This includes things like headphones or earphones, as well as heavy coats or jackets. They'll all need to go on the X-ray conveyor belt.
  • Your electronic devices like laptops and phones will also have to go on a tray to be scanned. No need to worry though, you'll be back online in no time.
  • Can't travel without your favourite hand cream? No problem. As long as it's in a container no larger than 3.4 ounces (100 milliliters) and it's stored in a zip-lock bag, it's fine to bring with you in your carry-on luggage.
  • It's also likely that you'll be required to remove your shoes for scanning, so wearing slip-on sneakers is always a smart idea.
  • Airlines will not allow any sharp or pointed objects in your carry-on baggage. If you need to bring these kinds of items, put them in your checked luggage.

Flights to Si Thoi information
Destination airport
Chiang Rai Intl.
Destination airport IATA code
CEI
Destination city name
Chiang Rai
Return price
S$75

Trending flights to Si Thoi

These prices were available within the past 7 days. Prices quoted are per person, return, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thai AirAsia
Thu, 28 Aug - Mon, 1 Sep
SIN
Singapore
CEI
Chiang Rai
S$292 Return, found 4 days ago
S$292
Return
found 4 days ago
Select Thai AirAsia flight, departing Thu, 28 Aug from Singapore to Chiang Rai, returning Mon, 1 Sep, priced at S$292 found 4 days ago
*Available to Expedia members.