Compare the Best Travel eSIMs for South Korea
Prepaid data eSIMs for visitors to South Korea, every plan ranked by real price per GB. This is not a South Korea contract or a local SIM. Updated daily.
The 3 best South Korea eSIMs right now
Nomad✓ Verified partner
GigSky✓ Verified partner
Ubigi✓ Verified partner
What South Korea data actually costs
South Korea travel eSIM prices look random until you convert every plan to one number: the real cost per gigabyte. Here is what that reveals right now.
The cheapest plan at each size, 30 days
| Data | Cheapest provider | Total | Price per GB | |
|---|---|---|---|---|
| 50 GB | Nomad | $39 | $0.78/GB | Get plan ↗ |
| 25 GB | Ubigi | $25 | $1.00/GB | Get plan ↗🏷 10% off with code TRAVELCITY10 |
| 20 GB | Nomad | $28 | $1.40/GB | Get plan ↗ |
| 10 GB | Ubigi | $14 | $1.40/GB | Get plan ↗🏷 10% off with code TRAVELCITY10 |
| 5 GB | Nomad | $10 | $2.00/GB | Get plan ↗ |
| 1 GB | Yesim | $3.07 | $3.07/GB | Get plan ↗🏷 15% off with code TRAVELCITY |
Cost per GB rises from $0.78/GB at 50 GB to $3.07/GB at 1 GB. Buying a little more data than you expect to use is almost always cheaper per gigabyte than buying exactly what you need.
The "unlimited" trap
The same words, unlimited for 30 days, cover a wide price range, and most plans slow down after a daily threshold that the label hides.
| Provider | Unlimited, 30 days | Fair-use cap | |
|---|---|---|---|
| Ubigi | $49 | Confirming | Get plan ↗🏷 10% off with code TRAVELCITY10 |
| Maya | $49.99 | Confirming | Get plan ↗🏷 10% off with code ATESIM |
| Yesim | $63.17 | Confirming | Get plan ↗🏷 15% off with code TRAVELCITY |
| Airalo | $69 | Confirming | Get plan ↗ |
| Saily | $71.99 | Confirming | Get plan ↗ |
| GigSky | $74.69 | Confirming | Get plan ↗🏷 15% off with code ATESIM |
Unlimited 30 day plans run from $49 to $74.69, a spread of about 52 percent, for a label that means the same thing on paper. Check the daily cap before you buy, especially if you plan to tether a laptop.
Do not overpay for coverage you will not use
If your whole trip is in South Korea, a South Korea only plan is far cheaper per gigabyte than a Asia or global plan carrying the same data. Same provider (Sim Local), same 20 GB, 30 days:
| Sim Local plan | Price | Price per GB | |
|---|---|---|---|
| South Korea only | $29.50 | $1.48/GB | Get plan ↗🏷 10% off with code ATESIM |
| Asia | $35 | $1.75/GB | Get plan ↗🏷 10% off with code ATESIM |
| Global | $35 | $1.75/GB | Get plan ↗🏷 10% off with code ATESIM |
A South Korea only plan costs much less per gigabyte than a regional or global plan with the same data. Only pay for the wider plan if you are actually crossing borders on this trip.
Which network does your South Korea eSIM use?
This is the question that decides your real signal, and almost no comparison site answers it. Your travel eSIM connects to one or more local networks as a visitor, and that choice matters the moment you leave the big cities, because rural coverage varies a lot between them.
| Provider | Host network | Status |
|---|---|---|
| Airalo | SK Telecom (5G) and LG U+ (separate plan lines) | Confirmed |
| GigSky | Not publicly disclosed | Confirming |
| Ubigi | LG U+ and SK Telecom (5G) | Confirmed |
| Nomad | SK Telecom (5G) and KT (4G, separate plan lines) | Confirmed |
| Saily | Not publicly disclosed | Confirming |
| Yesim | Not publicly disclosed | Confirming |
Airalo, Ubigi, and Nomad name their Korean host carriers and all lean on SK Telecom, KT, or LG U+, the only three networks in the country; GigSky, Saily, and Yesim do not name which carrier they use, though all traffic ultimately runs on one of the three national operators.
Coverage by where you are going
- All three carriers (SK Telecom, KT, LG U+) provide near-universal 4G LTE and 5G across cities, towns, and most rural areas; South Korea is one of the best-connected countries in the world.
- Seoul's subway has full underground cellular coverage on every line plus free public WiFi on trains and platforms.
- 5G launched commercially in April 2019 and now blankets all major cities; Opensignal ranks South Korea near the top globally for 5G availability and speed.
- Jeju Island and other inhabited islands run on the same three national carriers, with solid LTE and 5G in populated areas.
- The few weak spots are deep in mountainous national parks and some older tunnels, but coverage gaps are rare.
Travel eSIM vs a local South Korea SIM
A named-network travel eSIM from Airalo, Ubigi, or Nomad gives you data quality that matches the local telcos, since the traffic runs on SK Telecom, KT, or LG U+ anyway. These are data only, install by QR code before you land, and cover Seoul, Busan, and Jeju identically. Watch the speed tier: Airalo and Ubigi sell 5G plans, while some Nomad KT plans and older Airalo lines are 4G only.
SK Telecom, KT, and LG U+ each sell tourist prepaid eSIMs and physical SIMs at Incheon and Gimpo airport counters and online. A local SIM is worth it mainly if you need a Korean phone number for calls and texts, which usually requires a counter purchase and a minimum top-up of about 5,500 KRW. Data-only pricing from the telcos is broadly similar to the better travel eSIMs.
Quick rule: Use a named-network travel eSIM (Airalo, Ubigi, or Nomad) for data; only buy a local KT or LG U+ SIM if you need a Korean phone number.
South Korea's networks are SK Telecom, KT and LG U+, and KT's 30-day unlimited tourist eSIM is 64,300 KRW online (about $46), with all three carriers staffing prepaid counters inside Incheon Airport after immigration.
How a South Korea travel eSIM works
A travel eSIM replaces expensive roaming with a cheap local data plan you activate in seconds. There is no plastic SIM and no airport queue. Roaming with your home carrier can run 6 to 12 dollars a day, so a week easily tops 50 to 80 dollars for service you already pay for at home.
Three things to get right:
- Check your phone supports eSIM before you buy.
- Install the eSIM at home over WiFi, but wait to activate it until you land, because the validity period usually starts on activation.
- Keep your physical SIM in the phone for calls and texts on your normal number.
How we rank South Korea eSIMs
Every plan on this page is sorted by real price per GB (total price divided by included data, normalised to USD), so a cheap-looking 1 GB plan cannot outrank a better-value 10 GB one. We refresh prices daily and only list providers with a track record of activating on arrival. We earn a small affiliate commission when you buy through our links. It funds the price tracking and never changes the order you see.
South Korea travel eSIM FAQ
Which network will my eSIM actually use in South Korea?
Every eSIM runs on one of the three national carriers: SK Telecom, KT, or LG U+. Airalo uses SK Telecom and LG U+, Ubigi uses SK Telecom and LG U+, and Nomad uses SK Telecom and KT. GigSky, Saily, and Yesim do not publicly name their Korean carrier.
Do these eSIMs support 5G in South Korea?
Several do. Airalo's SK Telecom line, Ubigi, Yesim, and GigSky advertise 5G, and SK Telecom and LG U+ have strong 5G nationwide. Some cheaper plans are 4G LTE only, including Nomad's KT plans and certain older Airalo lines, so check the speed tier before buying. LTE in Korea is still fast enough for maps, video, and calls.
Are the unlimited plans really unlimited?
No, most apply a daily high-speed cap and then slow you down. Saily gives 5 GB per day, Airalo 3 GB per day, and Nomad 2 GB per day before throttling. Ubigi instead pools 60 GB of full-speed data across 30 days. Only the local Korean telco prepaid plans tend to be genuinely uncapped.
Can I make phone calls with a travel eSIM in Korea?
Travel eSIMs from these six providers are data only and do not include a Korean phone number. You can call and message over data using KakaoTalk, WhatsApp, or FaceTime. If you need a real Korean number, buy a KT or LG U+ prepaid SIM at an airport counter, which usually needs a minimum top-up of around 5,500 KRW.
Will my eSIM work on Jeju Island and outside Seoul?
Yes. Jeju Island and the rest of the country use the same three national carriers, so coverage is strong across Busan, Gyeongju, Jeju, and rural areas. The only likely dead spots are deep in mountainous national parks. Seoul's subway has full coverage underground plus free WiFi.
Does a Japan or Asia regional eSIM cover South Korea?
Only if South Korea is explicitly listed in the plan. Korea is not part of any roaming union, so regional Asia eSIMs sometimes exclude it or bill it as a separate zone. Always confirm South Korea is in the coverage list before buying a multi-country plan rather than assuming it is included.